Mr. Brown, forgive my Southern vernacular but yes I think it was in 1873 in following the money trail for the state of Wisconsin that there was a receipt where the state paid him to repair a Gatling gun. I suspect it wasn't the only occasion. He must have been a jack of all trades. Maybe Baumgarten knows of F. Huel, as he is near his backyard.

Kind Regards,

Raimey
rse