I believe the photo that you are looking for of Zischang at the Lefever Arms factory appeared in Robert Elliot's book, "Uncle Dan Lefever: Master Gunmaker".

I looked for it in the earlier book,"Lefever: Guns of Lasting Fame", but didn't find it.

I'll check the other book when I get home. If I can get a good picture of the photo, I'll post it.

Voting for anti-gun Democrats is dumber than giving treats to a dog that shits on a Persian Rug