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292   Art of Travel.

various parts of the world are as follows : -Knotting twigs ; breaking boughs, and letting them dangle down; a bit of white paper in a cleft stick; spilling water, or liquid of any kind, on the pathway ; a litter made of paper torn into small shreds, or of a stick cut into chips, or of feathers of a bird ; a string, with papers knotted to it, like the tail of a boy's kite,-tie a stone to the end of it, and throw it high among the branches of a tree.

Paint.-Whitewash (which see), when mixed with salt, or grease, or glue size, will stand the weather for a year or more. It can be painted on a tree or rock : the rougher the surface on which it is painted, the longer will some sign of it remain.

Black for Inscriptions is made by mixing lamp-black (which see) with some kind of size, grease, wax, or tar. Dr. Kane, having no other material at hand, once burnt a large K with gunpowder on the side of a rock. It proved to be a durable and efficient mark. When letters are chiselled in a rock, they should be filled with black to make them more conspicuous.

Blood leaves a mark of a dingy hue, that remains long upon a light-coloured, absorbent surface, as upon the face of sandy rocks.

ON FINDING THE WAY.

Recollection of a Path.-It is difficult to estimate, by recollection only, the true distances between different points in a road that has been once travelled over. There are many circumstances which may mislead, such as the accidental tedium of one part, or the pleasure of another ; but besides these, there is always the fact, that, in a long day's journey, a man's faculties of observation are more fresh and active on starting than later in the day, when, from the effect of weariness, even peculiar objects will fail to arrest his attention. Now, as a man's recollection of an interval of time is, as we all know, mainly derived from the number of impressions that his memory has received while it was passing, it follows that, so far as this cause alone is concerned, the earlier part of his day's journey

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