In the same part of the province, not far south of La Rinconada, are extensive plains of salt, called the Salinas of Casabindo, to which the natives of the adjoining districts resort when the salt is hard and dry, and cut out large blocks of it with hatchets, which they load upon their llamas and asses, and carry to Salta and Jujuy, and other parts of the province:--there, also, they collect, in the same manner, the snow which is used in those towns for making ices in the summer season. The eyes of travellers obliged to traverse these inhospitable wilds are said to be as much affected by the glare of the sun reflected from these fields of salt, as from the snow-capped mountains which bound them. Casabindo is about forty-five leagues east from Atacama, the intermediate distance being all Cordillera, and is situated upon the desolate road from Salta, which is appropriately called _El Despoblado_.[63] In the valleys, further south, of Colalao, San Carlos, Calchaqui, and Cachi, watered by the streams which afterwards fall into the Salado, as already described, large quantities of corn and maize are grown, with which the rest of the province is chiefly supplied: the vine is also extensively cultivated there, from which a good deal of an ordinary wine is yearly made and drunk in those parts for want of better. It was from their rich pastures, however, watered by the mountain streams, that the Salteños in former times derived their principal profits. Before the revolution, and when the upper provinces, which now form the separate state of Bolivia, were part of the Vice-Royalty of Buenos Ayres, a great trade was carried on by the people of Salta in mules, 50,000 or 60,000 of which were annually sold there for the service of the carriers of Peru:--these mules were chiefly bred in the provinces of Santa Fé and Cordova, and sent to Salta when two or three years old, where, after being kept for a season or two in the rich grazing grounds of that province, they were considered strong enough for the work expected of them in the severer climate of the Andes. A periodical fair was held in the neighbourhood of Salta, to which the purchasers from Peru repaired, and bought the animals in droves at the rate of fourteen or sixteen dollars each (five or six more if broken in), about a third of which was clear profit to the Salteños, who bought them of the Cordova and Santa Fecino breeders at a price seldom above ten dollars. These that reached Lima were worth double the price paid for them at Salta. A tax, called _sisa_, of three quarters of a dollar on each mule, was levied by the government, the annual amount of which was destined to the maintenance of the forts upon the frontier, kept up as defences against the encroachments of the Indians of the Chaco.