A and B are copies, one-sixteenth natural size, of rock painting found in the Azuza Cañon, 30 miles northeast of Los Angeles, California. The bowlder upon which the paintings occur measures 8 feet long, about 4 feet high, and the same in width. The figures occur on the eastern side of the rock, so that the left arm of the human figure on the right points toward the north. The map (C) at the bottom of the plate presents the topography of the immediate vicinity and the relative positions of the rocks bearing the two illustrations. The map is drawn on a scale of 1,000 yards to the inch. The stream is the North Fork of the San Gabriel River, and is hemmed in by precipitous mountains, with the exception of two points marked _c_, _c_, over which the old Indian trail passed in going from the Mojave Desert on the north to the San Gabriel Valley below, this course being the nearest for reaching the mission settlements at San Gabriel and Los Angeles. In attempting to follow the water-course the distance would be greatly increased and a rougher trail encountered. The pictograph A, painted on the rock marked _b_ on the map C, shows characters in pale yellow, upon a bowlder of almost white granite, which are partly obliterated by weathering and annual floods, though still enough remains to indicate that the right-hand figure is directing the observer to the northeast, although upon taking that course it would be necessary to round the point a short distance to the west. It may have been placed as a notification of direction to those Indians who might have come up the cañon instead of on the regular trail. Farther west, at the spot marked _a_ on the map, is a granite bowlder bearing a large number of paintings part of which have become almost obliterated. These were drawn with red ocher (ferric oxide). A selection of these is shown in B on the plate. This is on the western face of the rock, almost vertical. This also appears to refer to the course of the trail, which might readily be lost on account of the numerous mountain ridges and spurs. The left-hand figure appears to place the left hand upon a series of ridges, as if showing pantomimically the rough and ridged country over the mountains. The middle figure represents gesture, which in its present connection may indicate direction, of the trail, _i. e._, toward the left, or northward in an up-hill course, as indicated by the arm and leg, and southward, or downward, as suggested by the lower inclination of the leg, and lower forearm and hand on the right of the illustration. The right-hand figure, although similar in manner of delineating gesture and general resemblance to the Shoshonian method, is not yet determined in that connection.