The gunboats' part at Secessionville
Lieutenant Gillis of the USS E. B. Hale reported his vessel’s part in the attack on the Confederate battery on the morning of the 16th: at half past three in the morning he got under way with the Ellen and proceeded up Light-House Creek. The navy could reach Secessionville by water, and the army still had to cross the neck on foot.
Official Records of the Navies, Series I, Vol. 12