 The 1839 improvements were in response to Hunters' Lodges seizure of the steamer "Sir Robert Peel" The original 24-pounder cannon first installed in 1813 were remounted on the southeast and southwest corners of the ramparts, as were two 12-pounder cannon on the northeast and northwest corners, a 36-pounder carronade over the gate, and two 14-inch mortars on the parade behind the southern rampart facade.In addition, an enclosed, stone caponiere was constructed in the dry ditch outside the palisade on the south facade.This was accessed through a tunnel from the interior of the fort.