mention in this place, go a great way in my mind towards strengthening the possibility of their having moved from the Ohio river, and of their being a remnant of the followers of Madoc. I have much further to trace them yet, however, and shall certainly have more to say on so interesting a subject in future. Almost every mile I have advanced on the banks of this river, I have met evidences and marks of Indians in some form or other; and they have generally been those of the Sioux, who occupy and own the greater part of this immense region of country. In the latter part of my voyage, however, and of which I have been speaking in the former part of this Letter, I met the ancient sites of the O-ma-ha and Ot-to towns, which are easily detected when they are met. In +plate+ 121 (letter +a+), is seen the usual mode of the Omahas, of depositing their dead in the crotches and on the branches of trees, enveloped in skins, and never without a wooden dish hanging by the head of the corpse; probably for the purpose of enabling it to dip up water to quench its thirst on the long and tedious journey, which they generally expect to enter on after death. These corpses are so frequent along the banks of the river, that in some places a dozen or more of them may be seen at one view. Letter +b+ in the same plate, shews the customs of the Sioux, which are found in endless numbers on the river; and in fact, through every part of this country. The wigwams of these people are only moveable tents, and leave but a temporary mark to be discovered. Their burials, however, are peculiar and lasting remains, which can be long detected. They often deposit their dead on trees, and on scaffolds; but more generally bury in the tops of bluffs, or near their villages; when they often split out staves and drive in the ground around the grave, to protect it from the trespass of dogs or wild animals. Letter +c+ (same plate), shews the character of Mandan remains, that are met with in numerous places on the river. Their mode of resting their dead upon scaffolds is not so peculiar to them as positively to distinguish them from Sioux, who sometimes bury in the same way; but the excavations for their earth-covered wigwams, which I have said are two feet deep in the ground, with the ends of the decayed timbers remaining in them, are peculiar and conclusive evidence of their being of Mandan construction; and the custom of leaving the skulls bleached upon the ground in circles (as I have formerly described in +plate 48, Vol. I.+), instead of burying them as the other tribes do, forms also a strong evidence of the fact that they are Mandan remains. [Illustration: 121] [Illustration: 122]