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investigator some one with whom to leave the arrested 
person if it should be necessary for the investigator to go 
elsewhere or to attend to other business. 
Equipment .—To get away quickly, the investigator 
must have his equipment packed and ready beforehand. 
A notebook is one of the most essential items. Every¬ 
thing must be written down; no detail is too small. This 
becomes particularly important when the case must be 
taken up later by a special investigator who has not 
participated in the initial hunt for clues. Each searcher 
for clues should also have a map. A United States Geo¬ 
logical Survey quadrangle, or a forest recreation map, if 
accurate, is the most convenient base map on which to 
keep the general layout. 
What to do .—The first man or men at a fire must either 
take up the hunt for clues or insure that these will not 
be destroyed until the investigator can get there. They 
should see that fire fighters are kept from crowding around 
the fire until the ground has been looked over for evi¬ 
dence, and they must make all 'fire fighters stop horses 
and keep off the trails themselves, for at least 100 yards 
from the origin of the fire. Require men in charge of 
fire fighting to keep eyes open for clues and to note people 
met on trails, with time of meeting, especially outsiders 
first on the scene of a fire; to keep ears open for boastful 
or antagonistic remarks of fire fighters, who may them¬ 
selves have set the fire or know who did; and to report 
anything learned at once to the district ranger or other 
investigator. 
SEARCHING FOR CLUES. 
What are clues ?—No deed is done without leaving clues; 
the only question is the investigator’s ability to find them. 
A no-clue case means only that he was not up to the scratch 
in finding them. 
Anything is a clue which has any connection with the 
offense or its author. Tracks, camp-fire or lunch remains, 
‘‘plant” used to set off a fire, blanket or other threads 
pulled off by brush or trees, hairs, scraps of paper or other 
things carelessly or unintentionally left by the offender, 
