Dear Colin. In the 1980's there were plans instigated by myself and my relation in USA - Bill Clinton to have the papers researched and a published book. This never came to pass and if you do not now know of the whereabouts of the Thompson Papers I could only think that they may have been mislaid or even be held in USA. I think the Author interested was a Terry Teachout if this is of help now. Enjoy the day. Regards. Pat.