Well, I have just phoned Keighley library and wish I hadn't bothered! The first time the answer machine was on so I couldn't speak to anyone.
The guy who answered the phone was so rude and couldn't get me off the phone quick enough and said he had to ring off now. He did however answer my question though.
They do have maps covering the time I am interested in. I will have a look next time I'm down there.