That is one fine bridge with a great trove of stories. Used to look at it every day from my old office on Maiden Lane - forgotten much of the Roebling history, but remember that his wife/widow finished it and there was a problem firstly with nitrogen narcosis (bends) then with caissons/foundations and later with the cabling. I'm glad the barrels on the gun under investigation are from 1920 and not the late 1800's!!
Rs
K.