... that part of the fort, for its shells would be as hurtful to friends as foes. Instantly the garrison sprang to its guns, and musketeers swarmed upon the parapet. But Curtis held his ground until Pennybacker , sent by Ames, came to his support. The latter advanced rapidly to Curtis's right, drove the Confederates from the strong and almost unharmed palisades, extending from the west end of the landface ...