If you live in the country, I can show you an old Woodcraft trick. Look for a hollow tree. Sometimes you can pick one out afar, by the dead top, and sometimes by noting a tree that had lost one of the biggest limbs years ago. In any case, basswoods, old oaks and chestnuts are apt to be hollow; while hickories and elms are seldom so, for once they yield to decay at all, they go down.
Remember that every hollow tree is a tenement house of the woods. It may be the home
Oh, it is simple; I have often done it. First clear and level the ground around the tree for three or four feet; then cover it with a coat of dust, ashes, or sand—whichever is easiest to get; rake and brush it smooth; then wait over one night.
Next morning—most quadrupeds are night-walkers—come back; and you will find that every creature on four feet that went to the tree tenement-house has left us its trail; that is its track or trace.
No two animals make the same trail, so that every Squirrel that climbed, every 'Coon or 'Possum, every Tree-mouse, and every Cottontail that went by, has clearly put himself on record without meaning to do so; and we who study Woodcraft can read the record, and tell just who passed by in the night.