A communication from Mr. R. L. Fulton, of Reno, Nevada, tells that the drawing now reproduced as Fig. 54 is a pencil sketch of curious petroglyphs on a rock on the Carson river, about 8 miles below old Fort Churchill. It is the largest and most important one of a group of similar characters. It is basaltic, about 4 feet high and equally broad. [Illustration: FIG. 54.--Petroglyphs on Carson river, Nevada.] Mr. Fulton gives the following description: The rock spoken of has an oblong hole about 2 inches by 4 and 16 inches deep at the left end, which has been chipped out before the lines were drawn, if it was not some form of the ancient mill which is so common, as it seems to be the starting point for the whole scheme of the artist. The rock lies with a broad, smooth top face at an angle towards the south, and its top and southeast side are covered with lines and marks that convey to the present generation no intelligence whatever, so far as I can learn. A line half an inch wide starts at the hole on the left and sweeping downward forms a sort of border for the work until it reaches midway of the rock, when it suddenly turns up and mingles with the hieroglyphics above. Two or three similar lines cross at the top of the stone, and one runs across and turns along the north side, losing itself in a coating of moss that seems as hard and dry and old as the stone itself. From the line at the bottom a few scallopy looking marks hang that may be a part of the picture, or it may be a fringe or ornament. The figures are not pictures of any animal, bird, or reptile, but seem to be made up of all known forms and are connected by wavy, snake-like lines. Something which might be taken for a dog with a round and characterless head at each end of the body, looking towards you, occupies a place near the lower line. The features are all plain enough. A deer’s head is joined to a patchwork that has something that might be taken for 4 legs beneath it. Bird’s claws show up in two or three places, but no bird is near them. Snaky figures run promiscuously through the whole thing. A circle at the right end has spokes joining at the center which run out and lose themselves in the maze outside. The best known and largest collection of marks that I know of covers a large smooth ledge at Hopkins Soda Springs, 12 miles south of the summit on the Central Pacific railroad. The rock is much the same in character as those I have described, but the groundwork in this case is a solid ledge 10 feet one way and perhaps 40 the other, all closely covered with rude characters, many of which seem to point to human figures, animals, reptiles, etc. The ledge lies at an angle of 45°, and must have been a tempting place for a lazy artist who chanced that way.