The number of works manifestly connected in some way with their religion, guide us to some estimate of the prominence which their superstitions occupied, and that a religious system existed among them, in some degree resembling that of the ancient Mexicans. The immense tumuli heaped over the remains of the dead, show the regard which they attached to their chiefs, and the veneration in which they held their memory. The number and extent of their remains of all kinds, which occupy the fertile valleys, and which are confined almost entirely to them, indicate that an immense population once existed there, that it was stationary and therefore agricultural;[1] and if agricultural and stationary, that a different organization of society, different manners and customs, different impulses and feelings existed among them, than are to be found among the hunter and nomadic tribes, discovered by Europeans in possession of the country. Another class of antiquities has been discovered by these gentlemen, of which we only have the particulars in a letter. These consist of rocks sculptured with figures of men, of birds and animals. They are cut in outline, the lines being from one half to three quarters of an inch deep by about the same width. Only those on the sides of the rocks are visible. Those on the upper or horizontal faces are nearly obliterated. One represents an elk and is said to be very spirited. What may result from the future researches of Dr. Davis and Mr. Squier, remains to be seen; but sufficient has been developed to show that a people, radically different from the existing race of Indians, once occupied the valley of the Mississippi, and built the singular monuments in which it abounds. These also show that they were to a certain extent advanced in the arts and civilization. In short that they closely resembled in the character of their structures, ornaments and implements of war and husbandry, the races of Central America; if they were not indeed their progenitors or an offshoot from them. Many facts strongly point to such a conclusion and farther observations carefully conducted, will probably enable us to settle the question beyond a doubt. A detailed account of the researches of the gentlemen alluded to, accompanied by numerous engravings representing the implements, ornaments and sculptures, &c., discovered in their excavations;--surveys of the various earth works, forts and enclosures in the Scioto valley, will be given in the second volume of the Transactions of the American Ethnological Society, now preparing for publication. They are still actively engaged in their labors, and intend, should the facilities be extended them to carry on their operations, to examine every ancient relic to be found in Ohio and the adjacent parts, where these remains exist.