We subsequently hunted and killed guanaco and ostrich, and also saw some hares and partridges. At about 10 A.M. our eyes were gladdened by the sight of the sea, and presently the level plain rose into more undulating country, and from the crests of the elevations at times a full view of the inlet called the Laco de San Antonio presented itself.
Smoke was visible ahead, and we accordingly pushed on, and made a long and rapid march, the surface being here altogether free from the small stones which had previously caused so much damage to the horses’ feet. That night we halted, as usual, by the side of a lagoon, the water of which was not more than two inches deep.
Patricio during this day’s journey pointed out to me a dry lagoon near which efforts had been made to sink a well for obtaining a permanent supply of water, but, although the shaft was of some depth, none had been reached, and the work had been given up in despair. It is a mystery even to the Indians where the guanacos, wild horses, puma, and other game that exist in this desert, find water, as these lagoons, depending entirely on the rainfall for a supply of water, must inevitably, in this country where little rain falls, be dry for many months in the year. No doubt springs exist in hitherto undiscovered places.
Before leaving the travesia, a few remarks, which cannot claim to be called a description, may be interesting.
This desert consists of a plateau about three hundred feet above the level of the valley of the Rio Negro, stretching to the southward more than thirty leagues to Valchita. Of its extent westward I have no precise information; but it narrows considerably in the interior, forming an irregular triangle, with its base on the coast, and its apex near the junction of the Rio Limay and the northern streams.
The soil is either clay or sand and gravel, with small stones strewn thickly over the surface; while the only vegetation met with consists of the bushes already mentioned, and scanty tufts of coarse grass.
It is much dreaded by travellers, and, after traversing it, I can well believe the stories current of people having perished on the passage; the track once lost would be very difficult to regain; while the want of water in the summer, and the danger of horses straying and leaving the traveller helpless, are both probable risks. With all our watchfulness, two horses strayed away and were lost. In the winter there is no fear of want of water; but the fatigue of travelling is at all times great, and the horses are almost worn out by the time that the desert is passed. It serves, therefore, as a barrier, protecting Patagones from all danger of attack by the Indians from the south, who in their forays must descend the river. A large troop of horses can scarcely find pasture, and, after the rapid journey, would not be in a condition for their riders to attack with success, if opposed vigorously by people able to defend themselves.
This district appeared to form a distinct and well-defined limit between the habitats of various animals; as for instance, the Rhea Darwinii, or smaller ostrich of Patagonia, and the Rhea Americana. The latter, according to my experience, is never found to the south of it, and I am at a loss to understand how Mr. Cunningham could have met with any specimens of it, as he seems to imply.[12]
The Tehuelches often described the larger Rhea as found north of the travesia, and as distinct from that hunted in their country. They also particularly insisted on the fact that the Gama, or deer—abundant in the Rio Negro valley and the country north of it—is never met with south of the travesia. The same remark is true of the Viscacha and the Aguarra (Lupus manatus), though the latter is probably to be met with in the spurs of the Cordillera.
Patagonia may thus be properly considered as cut off by the Rio Negro and the line of the Cordillera, and possessing its own races and a separate Fauna and Flora.