"After fording the Rio Cármen, which, though usually without a drop of water in its channel, we now found a very turbulent stream, we did not meet with any object particularly worthy of remark, until we reached the Laguna de Encinillas [Lake of Live-Oaks, the size varies greatly with the season of drouth or rain.—Book Editor]. This lake is ten or twelve miles long by two or three in width, and seems to have no outlet even during the greatest freshets, though fed by several small constantly flowing streams from the surrounding mountains. The water of this lake during the dry season is so strongly impregnated with nauseous and bitter salts, as to render it wholly unpalatable to man and beast. The most predominant of these noxious substances is a species of alkali, known there by the title of tequesquite. It is often seen oozing out from the surface of marshy grounds, about the table plains of all Northern Mexico, forming a grayish crust, and is extensively used in the manufacture of soap, and sometimes by the bakers even for raising bread. Here we had another evidence of the alarming effects of the recent flood, the road for several miles along the margin of the lake being completely inundated. It was, however, in the city of Chihuahua itself that the disastrous consequences of the freshet were most severely felt. Some inferior houses of adobe were so much soaked by the rains, that they tumbled to the ground, occasioning the loss of several lives."