Although for obvious reasons the Indians were opposed to the establishment of roads and military posts in their country, the chief difficulty in the way of a treaty was their unwillingness to cease war on Mexico. The proposition to restore their Mexican captives met a prompt and decided refusal. As the Mexican captive element forms so large a proportion of the blood of these three tribes, the remarks of agent Fitzpatrick in this connection are of interest: The chief difficulty which occurred in negotiating the present treaty was not, however, presented in the article embracing the foregoing points, but in that which contemplates a cessation of hostilities against the neighboring provinces of Mexico and the restoration of prisoners hereafter captured. For a long time these tribes have been in the habit of replenishing their caballadas of horses from the rich valleys and pasture lands which border upon the Rio Grande. Yearly incursions have been made by them far into the interior of Chihuahua and Durango, and they but seldom return without having acquired much plunder, as well as many captives, from the defenseless inhabitants of that country. The name of the Comanche and Apache has become a byword of terror even in the villages and beneath the city walls of those fertile provinces. The consequences of those expeditions are twofold, for while they serve to sharpen the appetite for pillage and rapine, they also tend to keep up the numbers of the tribe. The large herds driven off produce the former result, and the prisoners captured contribute to the latter. The males thus taken are most commonly adopted into the tribe, and soon become the most expert leaders of war parties and the most accomplished of marauders. The females are chosen as wives and share the duties and pleasures of the lodge. In fact, so intermingled amongst these tribes have the most of the Mexican captives become that it is somewhat difficult to distinguish them. They sit in council with them, hunt with them, go to war with them, and partake of their perils and profits, and but few have any desire to leave them. Upon this account the chiefs of the nations refused positively and distinctly to entertain any proposals or make any treaties having in view giving up those captives now dwelling amongst them. They stated very briefly that they had become a part of the tribe; that they were identified with them in all their modes of life; that they were the husbands of their daughters and the mothers of their children, and they would never consent to a separation, nor could any persuasion or inducement move them to abate this position. All that could be accomplished was to make a provision for the future (_Report, 3_).