THE GREAT SIEGE OF GIBRALTAR. A477 
guns, mortars, and carriages. They include, a gun on a traversing 
platform, the Rock Mortar, a Swivle Platform, Lieut. K’s. Depress 
Carriage, Col. W’s Empetrardo Carriage, a Depress Mortar, Carriage 
and others. 
Depress Mortar Carriage, 
