We often found it necessary to halt upon the open plain, where the intensity of light and heat were much increased by the reflection of the sun's rays from the sand. The temperature indicated by the thermometer, suspended in the imperfect shade of our tent, or of a small tree, was however somewhat lower than that to which our bodies were exposed; and it will be believed our sufferings from this source were great, both on our marches and while encamped in the middle of the day. Our tent being too small to afford its imperfect shade to the whole party, we sometimes suspended blankets, using, instead of poles, our rifles and gunstocks, but the protection these could afford against the scorching glare of a vertical sun, was found extremely inadequate. At sunset we crossed what appears to be at some seasons of the year the bed of a large river at least two hundred yards wide, but at this time not a drop of water was found in it. It has a wide valley, and in every respect but the occasional want of water, is a large stream. A little beyond this we encamped for the night, having travelled twenty-eight miles. August 13th. The course of the river had now become considerably serpentine, so that our route along its valley was of necessity somewhat circuitous. Wishing to avoid the unnecessary travelling thus occasioned, we turned off from the river and ascended the hills, hoping to meet with an Indian trace leading across the country by the most direct route. Our search was however unavailing, only affording us an opportunity of examining a portion of the country remote from the river. This we found much broken with irregular hills, abrupt ravines, and deep valleys. At ten o'clock we met with a small stream of water running towards the river we had left, and crossing it, perceived the trace of a large party of mounted Indians which had ascended {305} the creek within a few hours previous. We supposed they must have been the band of Cumancias spoken of by the Bad-hearts; and, notwithstanding some fears we have had reason to entertain, that they would have treated us no better than the Kaskaias had done, we considered ourselves unfortunate in not having met them. Much confusion and uncertainty attends the limited information hitherto before the public concerning the wandering bands of savages who occupy the country between the frontiers of New Mexico and the United States. Some who have spoken of these Indians, seem to have included several of the erratic hordes already enumerated under the name of Hietans or Cumancias. From their wandering mode of life, it unavoidably happens that the same band is met by hunters and travellers in different parts of the country at different times, consequently they receive different appellations, and the estimate of their numbers becomes much exaggerated. Of this band we have no other information to communicate, than that they appeared, from the tracks of their horses