The Travels and Adventures of Monsieur Violet in California, Sonora, and Western Texas by Frederick Marryat

During my long absence and captivity among the Arrapahoes, I had often reflected upon the great advantages which would accrue if, by any possibility, the various tribes which were of Shoshone origin could be induced to unite with them in one confederacy; and the more I reflected upon the subject, the more resolved I became, that if ever I returned to the settlement, I would make the proposition to our chiefs in council.

The numbers composing these tribes were as follows: -- The Shoshones amounting to about 60,000, independent of the mountain tribes, which we might compute at 10,000 more; the Apaches, about 40,000; the Arrapahoes, about 20,000; the Comanches and the tribes springing from them, at the lowest computation, amounting to 60,000 more. Speaking the same language, having the same religious formula, the same manners and customs; nothing appeared to me to be more feasible. The Arrapahoes were the only one tribe which was generally at variance with us, but they were separated from the Shoshones much later than the other tribes, and were therefore even more Shoshone than the Apaches and Comanches.