...illa was soon pouring in a shower of grape and canister, which drove the artillerists from their guns and cleared the rifle-pits of sharp-shooters. In ten minutes time the victory was complete, and Plymouth was once more in Union hands. One battery still held out, but a shell from the Shamrock exploding in the magazine, the fort blew up, some of the fragments falling on the decks of the steamers. Th...