As to the "treatment of the sun," we find faces with rays, or divergent curves, in Schoolcraft, vol. i., p. 362, figs. 16 and 17, and p. 409, fig. 9; vol. iii., p. 493,--a circle with rays in the rock inscription (Delaware perhaps) on the Susquehanna near the Maryland line, a face without rays in the rock inscription (also Delaware, possibly) at Safe Harbor on the Susquehanna, and a face with rays, the counterpart of the carving in question, on a small broken tablet found near Akron, Ohio, in the collection of the late Mr. Dupont, of Philadelphia, who had no doubt of its authenticity. LIGHTNING IN INDIAN PICTOGRAPHY. The marks in the picture evidently representing forked lightning, and directed as in the language of the tradition at the forehead of the beast, are without parallel among the Indian pictographs within the writer's reach. The symbolic snake, or barbed zigzag of the Moquis--the only Indian lightning that the writer has been able to find--differs greatly from this, yet there seems no good reason why the Indian should not have sometimes represented lightning as he saw it. LINES CUT BY STEEL AND FLINT INSTRUMENTS. As to the steel-cut appearance of the lines, Dr. Brinton says: "The lines on the Lenape Stone are obviously cut with a steel instrument, making clean incisions, deepest in the centre and tapering to points, quite different from the scratch of a flint point"; and Dr. M. E. Wadsworth thinks that "the depth and regularity of the carvings indicate that they were made with some dulled steel tool like an awl." On the other hand Mr. J. E. Iddings does not know whether it is possible thus to distinguish the work of steel and flint instruments, and a series of experiments with the microscope and steel and flint points has induced the writer to believe that lines cut on a similar stone by "a dulled steel instrument" and a flint arrow-point cannot be distinguished after both have been washed and scrubbed. The appearance of such lines would of course depend much upon the sharpness of the flint or steel point, the kind of stone used, and whether the lines were cut by one or by a series of strokes. The single scratch of a scissors point on a shale tablet of similar hardness makes an incision in shape like the letter V; that of either an awl or flint arrow-head one like the letter U; while any line made by either instrument and consisting of a series of strokes will have its bottom furrowed by parallel grooves, as in the case of the large lines on the Lenape Stone.