Rich, follow this link to a recent bit about Williams & Powell:
http://www.doublegunshop.com/forums/ubbthreads.php?ubb=showflat&Number=175905&Searchpage=1&Main=15924&Words=williams+%26+Powell&Search=true#Post175905
My contributions to it are fairly fragmented but sooner or later we'll be able to dig up more information. Google Books has been my main resource but it takes a lot of sniffing.
You're out of luck finding records--they don't exist, according to the W. Richards firm. The bombing of Liverpool during WW2 took care of them!
