300 The Book of Woodcraft to answer when the toe-marks do not show; but this is settled by the faint claw-marks already noted. If still in doubt, I can follow till the fox chances on some place under a thick tree or on ice where there is very little snow, and here a distinct impression may be found. I have
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No. lo. often seen a curiously clear track across ice made by a gentle breeze blowing away all the snow except that pressed down hard by the impact of the toes, so that the black ice under has a row of clear-cut, raised tracks, a line of fox- track cameos, cut sharp on a black-ice base.