seeking info on Yerkes & Finan Wood Working Machine Co.

I am looking for info on the Yerkes & Finan Wood Working Machine Co. of St.
Louis. They were somehow related to the Hall & Brown Wood Working Machine
Co., also of St. Louis, but their history is unclear. I'm a regular
contributor to the Old WoodWorking Machines site, so I'm aware of the info
available there.

I own machines made by both Y&F and H&B and would be interested in info on
either. I'm particularly interested in literature; catalogs, brochures,
letters, etc. Thank you for your time.

Mike
Vinton, IA

http://home.mchsi.com/~mburian/machinery.html