update on the Sloan Valve Co..... Sent an e-mail to their marketing dept requesting some history, posted a query to my COOK-CO-L roots web mailing list (Chicago is in Cook Co. where Sloan is headquartered) and posted a query at the Chicago Historical Society web site. Checked some old Chicago City directory listings I had laying around and found two listings from 1908 that follow... SLOAN Valve Co. William E. Sloan pres; William J. Hilliard treas 203 S. Canal SLOAN William E. pres Sloan valve co 203 S Canal h 4220 Berkeley av In 1904 there was this listing for a William E. Sloan; SLOAN William E. estimator 79 Lake And in 1900.... SLOAN William E. foreman 319 Wabash