Just when you thought I had gone I am back! Paul, as a "Sideways"
thought, have you considered the National Railway Museum York, as
these were RAILWAY steamers.,they might have something. The reason I
say this, my local (Darlington) railway archive has extensive
coverage of railway owned steamers in the North East of England,
Particularly paddle Tugs. Stacks of high quality photos and a few
plans. Bye, Walter.