It is probable that the pictographs are intended to represent the salient features of a trading expedition from the north. The ceiling of the cavity found between the paintings represented in the two figures has disappeared, owing to disintegration, thus leaving a blank about 4 feet long, and 6 feet from the top to the bottom between the paintings as now presented. COLORADO. Petroglyphs are reported by Mr. Cyrus F. Newcomb as found upon cliffs on Rock creek, 15 miles from Rio Del Norte, Colorado. Three small photographs, submitted with this statement, indicate the characters to have been pecked; they consist of men on horseback, cross-shaped human figures, animals, and other designs greatly resembling those found in the country of the Shoshonean tribes, examples of which are given infra. Another notice of the same general locality is made by Capt. E. L. Berthoud (_a_) as follows: The place is 20 miles southeast of Rio Del Norte, at the entrance of the canyon of the Piedra Pintada (Painted rock) creek. The carvings are found on the right of the canyon or valley and upon volcanic rocks. They bear the marks of age and are cut in, not painted, as is still done by the Utes everywhere. They are found for a quarter of a mile along the north wall of the canyon, on the ranches of W. M. Maguire and F. T. Hudson, and consist of all manner of pictures, symbols, and hieroglyphics done by artists whose memory even tradition does not now preserve. The fact that these are carvings done upon such hard rock invests them with additional interest, as they are quite distinct from the carvings I saw in New Mexico and Arizona on soft sandstone. Though some of them are evidently of much greater antiquity than others, yet all are ancient, the Utes admitting them to have been old when their fathers conquered the country. Mr. Charles D. Wright, of Durango, Colorado, in a communication dated February 20, 1885, gives an account of some “hieroglyphs” on rocks and upon the walls of cliff houses near the boundary line between Colorado and New Mexico. He says: The following were painted in red and black paints on the wall (apparently the natural rock wall) of a cliff house: At the head was a chief on his horse, armed with spear and lance and wearing a pointed hat and robe; behind this character were some twenty characters representing people on horses lassoing horses, etc. In fact the whole scene represented breaking camp and leaving in a hurry. The whole painting measured about 12 by 16 feet. Mr. Wright further reports characters on rocks near the San Juan river. Four characters represent men as if in the act of taking an obligation, hands extended, and wearing a “kind of monogram on breast, and at their right are some hieroglyphics written in black paint covering a space 3 by 4 feet.”