Hi vacmo.
I used to go to the Henry company in Valipariso, Indiana quite often. It was run by John Henry, and yes, it was his father who started the company, which was then in Chicago. I lost touch with John Henry over 20 years ago, and don't know if he's even still alive. But he was the one who told me about the Hoover Historical Center way back in 1980. If you have any info on the Henry company, please share it.
Thanks,
Alex Taber.