GREAT SERPENT MOUND. A remarkable prehistoric earthwork, so called from its shape, on a narrow crescentic spur, about zoo ft. high, flanked by Brush creek and East creek, in Adams county, Ohio. Commencing with the partly obliterated head, at the very point of the spur, and proceeding to the tail, one comes to an enlargement, suggestive of the enlarged neck of the cobra, formed by an outer wall on each side beginning at the small head and uniting in the rear. Within this area is a wall, oval in plan, enclosing a low mound 15 ft. in diameter. In each side of the outer wall is an opening or gateway, and behind the interior oval is a slightly curved cross-wall. From the union of the main walls to the end of the tail the serpent body is repre sented by a single embankment, fairly uniform in size, but di minishing gradually toward the tip, having serpentine bends and ending with a coil of two complete turns. Following the curves and bends the entire length of the structure is 1,33o ft. and its width 15 to 20 feet. The height of the embankment probably never exceeded 4 feet. The most reasonable suggestion respecting the enlargement and its inner oval is that when the neck and head are restored, the oval marks the position of the heart of the rep tile and in all probability was the place where were performed the ceremonies in connection with the strange structure.