opossum, but knows in some way or other whether the marks were made to-day or yesterday.
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A TEST CASE.
And there is the case, on record, where A., a settler, makes a bet with B., that B. may lose a cow as effectually as he can, and A. will produce an aboriginal who will find her. B. selects a cow and lets the tracker see the cow's footprint, then be put under guard. B. then drives the cow a few miles over a course which drifts in all directions, and frequently doubles back upon itself; and he selects difficult ground all the time, and once or twice even drives the cow through herds of other cows, and mingles her tracks in the wide confusion of theirs. He finally brings his cow home; the aboriginal is set at liberty, and at once moves around in a great circle, examining all cow-tracks until he finds the one he is after; then sets off and follows it throughout its erratic course, and ultimately tracks it to the stable where B. has hidden the
cow. Now wherein does one cow-track differ from another? There must be a difference, or the tracker could not have performed the feat; a difference minute, shadowy, and not detectible by you or me, or by the late Sherlock Holmes, and yet discernible by a member of a race charged by some people with occupying the bottom place in the gradations of human intelligence.
