This work was never interrupted, though the force of men was now considerably reduced.

The law prohibiting excavations without the special permit of the Government of Mexico had not yet been promulgated.
I was so absolutely confident of the ultimate success of my efforts, in spite of discouragements, that I twice crossed the entire continent of North America, went down to the City of Mexico and came north again--a journey of over 20,000 miles--seeing prominent people and lecturing to arouse a public interest.

Finally, the American Museum of Natural History of New York decided to continue the explorations, the funds being this time supplied mainly through the munificence of the late Mr.Henry Villard, and toward the end of that year I was able to return to my camp, and in January, 1892, lead the expedition further south.

My scientific assistants were now: Mr.C.V.

Hartman, botanist; Mr.C.H.Taylor, civil engineer and photographer, and Mr.A.E.Meade, mineralogist and zoological collector.
This time we came upon Cave-Dwellers.