For a guy who was apparently a fairly prolific photographer there isn't much information on the web.
However, I did find this, from "The Photographic dealer", a trade mag, dated 1902. The subject is Cardwell's insolvency as a result of a fire:
"George Caldwell, photographer, of 9 St Peter's Gate, late trading at Wheeler Gate, prior to then at Long Row, and previous to that at King Street, and prior to then at Carrington Street, Nottingham."
The fire was at Carrington St.
http://www.rootschat.com/links/05p9/ Cheers,
China