The author’s discussion respecting the difference in size between the male human figures mentioned as indicating their respective tribes would have been needless had he considered the frequent expedient of representing chiefs or prominent warriors by figures of much larger stature than that of common soldiers or subjects. This device is common in the Egyptian glyphs, and examples of it also appear in the present work. (See Figs. 138, 139, and 1024.) The same author, loc. cit., gives a brief account of two petroglyphs found by him near Leribo, in Basutoland, South Africa. They were on a large hollow rock overlooking a plain where the bushmen might spy game. The rock was all covered with pictures to a man’s height. Many of them were entirely or almost entirely spoiled, both by the hands of herdsmen and by water running down the walls in time of rain. Some of them, however, are still very well preserved. They are shown on Fig. 143. [Illustration: FIG. 143.--Petroglyphs in Basutoland, South Africa.] The left hand character represents a man milking an animal; the latter, judging by the back part, especially by the legs, was at first taken for an elephant; but the fore parts, especially the fore legs, evidently are those of a bovine creature or of an elk (eland). The enormous proportions of the back part are probably due to diffusion of colors, through the action of water running down the rock. The right hand character represents the sketch of an elk (eland), on which and under which are depicted four monkeys, admirable for fidelity of expression. The legs, with one exception, are not finished. CANARY ISLANDS. These islands are considered in connection with the continent of Africa. [Illustration: FIG. 144.--Petroglyphs in the Canary islands.] S. Berthelot (_a_) gives an account, referring to Figs. 144 and 145, from which the following is extracted and translated: A site very little frequented, designated by the name of Los Letreros, appears to have been inhabited in very ancient times by one of the aboriginal tribes established on the Island of Fer, one of the Canary islands. At a distance of about three-quarters of a league from the coast all the land sloping and broken by volcanic mounds extends in undulations to the edge of the cliffs which flank the coast. It is on this desert site, called Los Letreros, that inscriptions are found engraved on an ancient flow of basaltic lava, with a smooth surface, over an extent of more than 400 meters. On all this surface, at various distances and without any relation to each other, but placed where the lava presents the smoothest spots, rendered shining and glassy by the light varnish left by the volcanic matter in cooling, are the various groups of characters.