volume xviii, p. 94, note 56. The tornillo is _Prosopis pubescens_,

the fruit of which is often called the screw-bean, and used by the Indians both for food and fodder.--ED.

[108] A particular species of _agave_, called _A. lechuguilla_, abounding in the El Paso region. See J. N. Rose, "Useful Plants of Mexico," in U. S. Herbarium _Contributions_, volume v, no. 4, p. 209.--ED.

[109] Lake Patos (Lake of Geese), in northern Chihuahua, is the outlet for Rio Carmen.--ED.

[110] Carrizal was founded about 1750, and at one time considered a part of the province of New Mexico. It was later made a presidio, or frontier fort, with a surrounding wall.--ED.

[111] Wislizenus found the temperature of these springs 84° Fahrenheit. There is now a station called Ojo Calientes, on the Mexican Central Railway, but it is some distance from the springs.--ED.

[112] The size of Laguna de Encinillas (Lake of Live-Oaks) varies greatly with the season of drouth or rain.--ED.

[113] For a brief sketch of Chihuahua, see Pattie's _Narrative_, in our volume xviii, p. 153, note 85.--ED.