This reminds me of one of those old 'Howdah' pistols popular in India during the days of the Indian Viceroys. The idea was, I belive, that such a large bore side by side was used as a last resort in case one of the Nabobs aboard a Howdah (a kind of big multi- passenger semi-enclosed elephant saddle) failed to make a killing shot. If the offended, and possibly wounded tiger decided to jump up on the Howdah to get a little payback, the Howdah pistol, loaded with huge single balls, would dissuade said upset tiger.