It was towards the end of May, 1855, in one of the least visited parts of the immense prairies of the Far West, and at a short distance from the Rio Colorado del Norte, which the Indian tribes of those districts call, in their language so full of imagery, "The endless river with the golden waves." The night was profoundly dark. The moon, which had proceeded two-thirds of its course, displayed between the lofty branches of the trees her pallid face; and the scanty rays of vacillating light scarce brought out the outlines of the abrupt and stern scenery. There was not a breath in the air, not a star in the sky. A silence of death brooded over the desert-a silence only interrupted, at long intervals, by the sharp barking of the coyotes in search of prey, or the savage miaulings of the panthers and jaguars at the watering place.