[TheForge] Period power hammer?

[Peter Hirst]

I have the opportunity to take over a historic shop, on one condition:  no electricity.  This is fine with me, as 90 percent of what I do anyway is  hand work  (can do my electric welding and grinding off site) but I have been hoping to get into some heavier stuff with a small power hammer.  Is there any period technology (other than water or steam) for say a 25 lb hammer?  Treadle and flywheel maybe?  Just starting to research this so any help is much appreciated.