It is. And - never mind, my wife saw me frustrated, asked what I was trying to search, I told her, she found it. DUH! I feel stupid now. What I told her was "I'm looking for the patent number for the 3 in. wrought iron gun, patent issued to John Griffin in 1855." She found it in about a minute, as a footnote in the googlebooks of Hazlette. (sp?). From that I did a search in the US Pat. Off. and found: