Never heard of a gun by that name. However, in the National Archives I found brief descriptions and drawings of a pair of very odd guns recovered by the USN in Texas after the CW. They were made from the propellor shaft of a steamer. "Westfield" sticks in my mind-might be the name of the steamer. I remember the drawings, about the oddest looking guns I'd ever seen. Maybe I'll get a chance to look for my photos of those drawings tomorrow. Any more info you can provide as far as dates, places, etc. might help us see if we're talking about same thing. If there was only ever one of the Nichols guns, we're out of luck because this was definitely a pair of identical guns.