CASE 18.—Private Charles H. Leonard, Co. H, 57th Massachusetts Volunteers, aged 22 years, was wounded, at the battle of the Wilderness, Virginia, May 6th, 1864, by a conoidal musket ball. He was conveyed to Washington, D. C., and, on May 11th, admitted to the Columbian Hospital. There was a wound of the scalp over the left occipital protuberance, but the external table was not fractured. On May 15th, Acting Assistant Surgeon H. D. Vosburgh applied the trephine, removed a portion of bone, and took out a fragment of the inner table, which was lying loose on the dura mater. Coma supervened, and death occurred on May 17th, 1864, from encephalitis.