Thanks Allen; our photos are crap compared to yours! Joe, one of the first guns and batteries was Battery Potter at Fort Hancock, New Jersey, which, with similar guns at Fort Hamilton, Brooklyn, New York, guarded New York Harbor from enemy vessel bombardment during the Spanish-American War. This two gun battery was a huge one with both guns mounted on a large steam-operated lift platform with a separate, sliding, recoil-retardation, mechanisms. Lots of shells and bolts piled near the entrance in 2007 when Mike and I visited. Don't forget to see the 20" Rodman Gun and a small seacoast gun museum there too, if you ever visit.
T&M