"On the 5th of June, we found ourselves once more traveling on a firm rolling prairie, about the region, as we supposed, of the boundary between the United States and Mexico; when Lieut. Bowman, in pursuance of his instructions, began to talk seriously of returning. While the wagons were stopped at noon, a small party of us, including a few dragoons, advanced some miles ahead to take a survey of the route. We had just ascended the highest point of a ridge to get a prospect of the country beyond, when we descried a herd of buffalo in motion and two or three horsemen in hot pursuit. "Mexican Ciboleros!" [Mexican Buffalo Hunters!] we all exclaimed at once; for we supposed we might now be within the range of the buffalo hunters of New Mexico. Clapping spurs to our horses, we set off towards them at full speed. As we might have expected, our precipitate approach frightened them away and we soon lost sight of them altogether. On reaching the spot where they had last been seen, we found a horse and two mules saddled, all tied to the carcass of a slain buffalo which was partly skinned. We made diligent search in some copses of small growth, and among the adjacent ravines, but could discover no further traces of the fugitives. The Indian rigging of the animals, however, satisfied us that they were not Mexicans."