 Confederate forces had already sunk several vessels to block the channel, and the frigate was in great danger, but "Keystone State" succeeded in towing her to safety.Flag Officer Hiram Paulding then transferred his flag to the "Keystone State" and proceeded to Washington.On June 19, 1861, Trenchard was given command of the supply ship , formerly the "Eagle", a 236-foot side-wheel steamer built for the Charleston Line.