In the course of this work, a few general remarks have been hazarded respecting the Indian tribes of the prairies, and the dangers to be apprehended from them in future times to our trade beyond the Rocky Mountains and with the Spanish frontiers.  Since writing those remarks, we have met with some excellent observations and suggestions, in manuscript, on the same subject, written by Captain Bonneville, of the United States army, who had lately returned from a long residence among the tribes of the Rocky Mountains.  Captain B. approves highly of the plan recently adopted by the United States government for the organization of a regiment of dragoons for the protection of our western frontier, and the trade across the prairies.  “No other species of military force,” he observes, “is at all competent to cope with these restless and wandering hordes, who require to be opposed with swiftness quite as much as with strength; and the consciousness that a troop, uniting these qualifications, is always on the alert to avenge their outrages upon the settlers and traders, will go very far towards restraining them from the perpetration of those thefts and murders which they have heretofore committed with impunity, whenever stratagem or superiority of force has given them the advantage.  Their interest already has done something towards their pacification with our countrymen.  From the traders among them, they receive their supplies in the greatest abundance, and upon very equitable terms; and when it is remembered that a very considerable amount of property is yearly distributed among them by the government, as presents, it will readily be perceived that they are greatly dependent upon us for their most valued resources.  If, superadded to this inducement, a frequent display of military power be made in their territories, there can be little doubt that the desired security and peace will be speedily afforded to our own people.  But the idea of establishing a permanent amity and concord amongst the various east and west tribes themselves, seems to me, if not wholly impracticable, at least infinitely more difficult than many excellent philanthropists have hoped and believed.  Those nations which have so lately emigrated from the midst of our settlements to live upon our western borders, and have made some progress in agriculture and the arts of civilization, have, in the property they have acquired, and the protection and aid extended to them, too many advantages to be induced readily to take up arms against us, particularly if they can be brought to the full conviction that their new homes will be permanent and undisturbed; and there is every reason and motive, in policy as well as humanity, for our ameliorating their condition by every means in our power.  But the case is far different with regard to the Osages, the Kanzas, the Pawnees, and other roving hordes beyond the frontiers of the settlements.  Wild and restless in their character and habits, they are by no means so susceptible