used before a singular noun to mean one of a group, when it is not a particular one
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
aboriginesnounUS /ˌæbərˈɪdʒəniz/
plural of “aborigine” — an indigenous person who was born in a particular place
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
a vaguely specified concern
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
the form of “a” used before a word that begins with a vowel sound
From this reading So the result of the inspection of an apparently recent battle ground was nil.
used to join words or parts of a sentence that go together
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
from appearances alone
From this reading So the result of the inspection of an apparently recent battle ground was nil.
past form of “appear” — give a certain impression or have a certain outward aspect
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
areanounUS /ˈeriə/
a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography)
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
past form of “arrive” — reach a destination; arrive by movement or progress
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
artsnounUS /ɑːrts/
studies intended to provide general knowledge and intellectual skills (rather than occupational or professional skills)
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
at the same time that; because; in the way that
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
in or near a particular place or position
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
a hostile meeting of opposing military forces in the course of a war
From this reading So the result of the inspection of an apparently recent battle ground was nil.
beenauxiliary verbUS /bɪn/
the past participle of “be”
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
inflected form of “begin” — take the first step or steps in carrying out an action
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
accept as true; take to be true
From this reading "I believe we've exhausted every possibility of a clew to the mystery in this spot," declared Cub at the end of half an hour's search.
plural of “boy” — a youthful male person
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
breaksnounUS /breɪks/
plural of “break” — some abrupt occurrence that interrupts an ongoing activity
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
used to introduce something that contrasts with what came before
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
exercising caution or showing care or attention
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
clewnoun
a ball of yarn or cord or thread
From this reading "I believe we've exhausted every possibility of a clew to the mystery in this spot," declared Cub at the end of half an hour's search.
codenounUS /koʊd/
a set of rules or principles or laws (especially written ones)
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
combatnounUS /ˈkɑːmbæt/
an engagement fought between two military forces
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
cousin'snounUS /ˈkʌzənz/
possessive form of “cousin” — the child of your aunt or uncle
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
Crusoe
Dictionary entry pending editorial verification. Tap Listen to hear the word.
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
CubnounUS /kʌb/
an awkward and inexperienced youth
From this reading "I believe we've exhausted every possibility of a clew to the mystery in this spot," declared Cub at the end of half an hour's search.
made known or openly avowed
From this reading "I believe we've exhausted every possibility of a clew to the mystery in this spot," declared Cub at the end of half an hour's search.
defyverbUS /dɪˈfaɪ/
resist or confront with resistance
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
diarynounUS /ˈdaɪəri/
a daily written record of (usually personal) experiences and observations
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
either extremity of something that has length
From this reading "I believe we've exhausted every possibility of a clew to the mystery in this spot," declared Cub at the end of half an hour's search.
everydeterminerUS /ˈevəri/
all the members of a group, with none left out
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
your basis for belief or disbelief; knowledge on which to base belief
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
the act of examining something closely (as for mistakes)
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
drained of energy or effectiveness; extremely tired; completely exhausted
From this reading "I believe we've exhausted every possibility of a clew to the mystery in this spot," declared Cub at the end of half an hour's search.
FirstadjectiveUS /fɜːrst/
preceding all others in time or space or degree
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
foliagenounUS /ˈfoʊlɪdʒ/
the main organ of photosynthesis and transpiration in higher plants
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
the part of the leg of a human being below the ankle joint
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
footprintsnounUS /ˈfʊtprɪnts/
plural of “footprint” — a mark of a foot or shoe on a surface
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
intended to be given to, or used by, somebody
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
set up or found
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
to or at a greater extent or degree or a more advanced stage (“further” is used more often than “farther” in this abstract sense)
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
shoot down, of birds
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
the solid part of the earth's surface
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
hadauxiliary verbUS /hæd/
the past form of “have”, used to form the past perfect
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
Hal
Dictionary entry pending editorial verification. Tap Listen to hear the word.
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
consisting of one of two equivalent parts in value or quantity
From this reading "I believe we've exhausted every possibility of a clew to the mystery in this spot," declared Cub at the end of half an hour's search.
belonging to a man, boy, or male animal already mentioned
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
Hook-Up
Dictionary entry pending editorial verification. Tap Listen to hear the word.
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
hour'snounUS /ˈaʊərz/
possessive form of “hour” — a period of time equal to 1/24th of a day
From this reading "I believe we've exhausted every possibility of a clew to the mystery in this spot," declared Cub at the end of half an hour's search.
the person speaking or writing, as the subject of the verb
From this reading "I believe we've exhausted every possibility of a clew to the mystery in this spot," declared Cub at the end of half an hour's search.
inside something, or within a place, period, or state
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
inspectionnounUS /ˌɪnˈspekʃən/
a formal or official examination
From this reading So the result of the inspection of an apparently recent battle ground was nil.
a thing, animal, or idea already mentioned
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
the superlative of “little” that can be used with mass nouns and is usually preceded by “the”; a quantifier meaning smallest in amount or extent or degree
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
of comparatively little physical weight or density
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
mathematicsnounUS /ˌmæθəˈmætɪks/
a science (or group of related sciences) dealing with the logic of quantity and shape and arrangement
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
used to say something is possible but not certain
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
a form of address for a man
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
something that baffles understanding and cannot be explained
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
nilnounUS /nɪl/
a quantity of no importance
From this reading So the result of the inspection of an apparently recent battle ground was nil.
used to make a word, phrase, or sentence negative
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
belonging to, or connected with, somebody or something
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
touching and supported by a surface
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
To move from a closed position.
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
not allowed to continue to bat or run
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
PerrynounUS /ˈperi/
United States philosopher (1876-1957)
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
involving the body as distinguished from the mind or spirit
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
a future prospect or potential
From this reading "I believe we've exhausted every possibility of a clew to the mystery in this spot," declared Cub at the end of half an hour's search.
recentadjectiveUS /ˈriːsənt/
new
From this reading So the result of the inspection of an apparently recent battle ground was nil.
a phenomenon that follows and is caused by some previous phenomenon
From this reading So the result of the inspection of an apparently recent battle ground was nil.
scoffer's
Dictionary entry pending editorial verification. Tap Listen to hear the word.
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
scrutinizedverbUS /ˈskruːtənaɪzd/
past form of “scrutinize” — to look at critically or searchingly, or in minute detail
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
try to locate or discover, or try to establish the existence of
From this reading "I believe we've exhausted every possibility of a clew to the mystery in this spot," declared Cub at the end of half an hour's search.
past form of “seem” — give a certain impression or have a certain outward aspect
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
the land along the edge of a body of water
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
skilledadjectiveUS /skɪld/
having or showing or requiring special skill
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
for that reason; with the result that
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
a point located with respect to surface features of some region
From this reading "I believe we've exhausted every possibility of a clew to the mystery in this spot," declared Cub at the end of half an hour's search.
being definitely out of the ordinary and unexpected; slightly odd or even a bit weird
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
subtletiesnounUS /ˈsʌtəltiz/
plural of “subtlety” — a subtle difference in meaning or opinion or attitude
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
to a sufficient degree
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
suggestverbUS /səˈdʒest/
make a proposal, declare a plan for something
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
surroundingsnounUS /sərˈaʊndɪŋz/
the environmental condition
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
the process of shedding tears (usually accompanied by sobs or other inarticulate sounds)
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
used to introduce what somebody said, thought, or felt
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
used before a noun that is already known, already mentioned, or the only one of its kind
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
the people, animals, or things already mentioned, as the subject
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
used for a person or thing that is near, or that has just been mentioned
From this reading "I believe we've exhausted every possibility of a clew to the mystery in this spot," declared Cub at the end of half an hour's search.
the cardinal number that is the sum of one and one and one
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
propel through the air
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
an instance or single occasion for some event
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
used before the base form of a verb to make the infinitive
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
trampledverbUS /ˈtræmpəld/
past form of “trample” — tread or stomp heavily or roughly
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
twigsnounUS /twɪɡz/
plural of “twig” — a small branch or division of a branch (especially a terminal division); usually applied to branches of the current or preceding year
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
twistsnounUS /twɪsts/
plural of “twist” — an unforeseen development
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
in a violent manner
From this reading First they scrutinized every foot of ground where the grass had been trampled so violently, it seemed, as to suggest a physical combat.
wasauxiliary verbUS /wɑːz/
the past form of “be” used with I, he, she, it, or a singular noun
From this reading So the result of the inspection of an apparently recent battle ground was nil.
we've
Dictionary entry pending editorial verification. Tap Listen to hear the word.
From this reading "I believe we've exhausted every possibility of a clew to the mystery in this spot," declared Cub at the end of half an hour's search.
wereauxiliary verbUS /wɜːr/
the past form of “be” used with you, we, they, or a plural noun
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.
in or at the place that
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
used to introduce a clause giving more about a thing just mentioned
From this reading The Hook-Up on Shore Arrived at the open area where Hal had found his cousin's "Crusoe diary", the three boys and Mr. Perry began a careful examination of the surroundings for further evidence that might throw light on the strange affair, which, for the time at least, appeared to defy the mystery scoffer's "mathematics".
exert oneself by doing mental or physical work for a purpose or out of necessity
From this reading But they were not sufficiently skilled in the arts and subtleties of the aborigines to work out the "code" of footprints and twists, tears, and breaks in the grass, twigs and foliage.