In the same locality, as well as in the adjacent plains of San Diego, Chihuahua, we found numerous mounds covering house groups, similar in construction to those in the caves.

From underneath their floors we unearthed about five hundred beautifully decorated pieces of pottery.
Among the further results of the expedition may be mentioned the gathering of large collections of plants, among them twenty-seven species new to science; fifty-five mammals, among which the _siurus Apache_ was new to science, and about a thousand birds.

A complete record was made of meteorological observations.
Thus far, although the question regarding surviving cliff-dwellers was answered negatively, the field southward in the sierra was so promising that I was eager to extend my explorations in that direction.

The funds of the expedition, however, began to run low, and in April, 1891, I had to return to the United States to obtain more money with which to carry on a work that had opened so auspiciously.

I left my camp in San Diego in charge of one of my assistants, instructing him to go on with the excavations during my absence.