Patagonia received its name, _patagon_, or large paw, from the enormous footprints which the Spanish explorers remarked in the sand. Till recently it was almost a _terra incognita_, roamed by Indians and herds of guanacos, but of late years the beginnings of settlement have been made, and sheep-farming has become a considerable industry. The southern portion is cold and inclement all the year round, but in the north the summers are hot. The country is well watered by six considerable rivers--the Negro, Chubut, Santa Cruz, Deseado, Coyly, and Gallegos--but scarcity of rain has caused it to be neglected by agriculturists. The whole of the plateau, indeed, has been called the Great Shingle Desert; it is of Tertiary formation, and the endless waste of sand and gravel was chiefly contributed by glacial action. This inhospitable desert is arranged in terraces which slope gently eastward, first from heights of 2,000 feet to 500, and then from this lower elevation to the sea-level. In old days wonderful tales were told about the Patagonian giants--their enormous size, strength, and ferocity, but here it need only be said that the accounts were at least exaggerated. "In height, although very much above the average--some, indeed, reaching the height of 6 feet 4 inches, and all being broad and muscular--they have been greatly exaggerated, for, being very long in the body, they seem to tower above the European while sitting on horseback. They are short in the legs, and when standing on the ground do not on an average come over about 5 feet 11 inches."[3] The Andine region, which in some of the South American States is the overwhelming characteristic, does not set a distinctive mark upon Argentina--essentially a plain country--but the western frontier of the Republic is guarded by a colossal range of mountains. These begin with Cerro de las Granadas in the extreme north, and extend beyond the Upper Colorado basin, where the Sierra Auco Mahinda of 16,000 feet is one of the most southerly of the important peaks. After this, although there is still a chain of moderate height, the mountains are not distinctively Andine. The highest of all the Argentine mountains is probably the Nevado de Famatina. [Illustration: ANDINE PASS.] In general this region is excessively dry and the mountains are almost bare of vegetation. The annual rainfall at Mendoza is but 6 inches and at San Juan it is only 3.