...ing them. The engagement continued until about 7.30, when, it becoming dark, the Commodore Hull and Ceres were sent ahead to keep the ram in sight, and to remain on picket duty off the mouth of the Roanoke River , if he succeeded in entering it; the Mattabesett, Wyalusing, Miami, and Whitehead coming to anchor in the sound two miles and a half below. Eight torpedoes have been furnished by the army, and an a...