Libraries, especially those that have existed for a long time are wonderful sources for unusual books. The librarians in them often know of things you would never find by normal searching.

As to your partner- Sometimes an interested listener will draw out things that might not have been said otherwise. Prepare to here tales of things (like antics of grandchildren) that may have no interest to you. Listen, as a friend, anyway. At worst this is the chaff that you must go through to get at the wheat. At best you will make a friend who will then abandon his funk and help you to prosper in this business.

I am reminded of a description I read of apprenticeship in a Japanese shop. To paraphrase- The master will teach you nothing- in fact he will try to hide secrets from you. If you are a worthy student you will find ways to steal the knowledge from him. I assume that at some point you would have proven your worth and the master's indifference would abate.
Bill

Grasshopper :)

I like the books of John P. Stewart for down to earth metalworking technique, tool use, fabrication and distortion control. here are the names of his books.

Stewart, J.P. Welder/Fitter's Guide

Stewart, J.P. Distortion Control

Stewart, J.P. Flame Straightening Technology

texarc,
I think Bill has some good advise concerning your partner. I have found what he said to have worked for me in times past. Some of these "older gents" in our shop have a lot of info tucked away for recalling, if you are willing to invest the time to listen. And like Bill said, be prepared to listen to "all" of the stories to get to the ones you are particularly interested in.
Just my two cents,(Bill deserves credit for the other 98 cents worth)
John Wright