Thanks, Maxwell (and Nick). I have positively identified the person/company who made this engine, and it's not Buckman. I'm hoping to find a picture to use in the article I'm working on. The picture I posted here is from a 2009 auction. Even without a boiler a picture that provides a sense of scale would be useful. The company had only been in business a few years when they shut down in 1873. Their engines were more expensive than Buckmans.