A stunning photo-display of what's left of Bannerman's Island:
As American Heritage describes it, "this island fortress was once the private arsenal of the world’s largest arms dealer." And that was Frank "Francis" Bannerman.
Bannerman, we learn, "bought up ninety per cent of all captured guns, ammunition, and other equipment auctioned off after the Spanish-American War. He also bought weapons directly from the Spanish government before it evacuated Cuba. These purchases vastly exceeded the firm’s capacity at its store in Manhattan and filled three huge Brooklyn warehouses with munitions, including thirty million cartridges." Accordingly, "Bannerman now needed an arsenal."
Or, more accurately speaking: he needed a private island.