... J. H. Tombs, Walker Cannon, pilot, and James Sullivan, fireman, on board the propeller David, a small submerged steamer. The boat approached the ironclad at 9 p. m. at full speed, and when hailed, Glassell answered with a shot from a double-barreled gun. The boat struck fairly under the starboard quarter, and the torpedo was exploded about 6 1/2 feet below the surface, but it proved to be of too light ...