This morning I called into the Tring Local History Museum to discover a brand new temporary display of old photographs by local photographers such as C. A. Howlett, such as this one of Goldfield Windmill. I gather that they are likely to be on display for perhaps a couple of months - so if you happen to be in Tring on a Friday or Saturday why not drop in and have a look.
This web site has a draft index of Tring Photographers & post card publishers which needs some updating.