and which, although very steep, is composed of loose sand through which they descended very rapidly. It was after night when they arrived at the limit of vegetation, but having taken a different direction, they did not strike the place where they expected to meet the Indians. They made a large fire as a signal, but the Indians did not make their appearance; and on the following morning, the 21st of April, separating to the right and left, and after shouting, they soon rallied the Indians. The reunited party descended to the rancho de la Vaqueria, and from this they passed through the village of Atlauca; at eight in the evening reached Ameco, and on the 23d of April returned to Mexico.
| Names of places. | N. Latitude | Longitude east from Mexico. | Elevation above the level of the ocean. | |
|---|---|---|---|---|
| Ameco a village | 19° 7´ 40´´ | 0° 23´ 30´´ | 8,216 | Eng. feet. |
| St. Nicolas de los Ranchos | 19° 4´ 21´´ | 0° 32´ 30´´ | 8,087 | do. |
| Tochimilco | 6,930 | do. | ||
| Superior limit of pines | 12,544 | do. | ||
| Limit of all vegetation | 12,693 | do. | ||
| Picacho de S. Guliermo [55] | 16,895 | do. | ||
| The most elevated border of the crater of the volcano of Popocatepetl | 17,884 | do. | ||
| Rancho de la Vaqueria | 10,784 | do. |