Battery Stevenson was built atop Fort Warren's original casemates, which were transmogrified into shell magazines. These 12" shells were lifted to the guns with "back delivery electric shell hoists," whereupon they would appear on this convenient platform with a cheery "PINNG!" announcing their delivery.

Well, I would have labored to cause there to be a cheery "PINNNG!" with the delivery of each shell, even if the only way to do so would be to shriek, "PINNG!"