Brian:
I would very much appreciate obtaining a copy of your relative's report on the Powder River Expedition. I own a fourth generation ranch in SE Montana near one of the potential Cole campsites and have spent the past five years looking for physical evidence of these Cole 1865 campsites in Western SD and SE Montana. You can either e-mail a scanned copy of the report to sherryfarwell@rap.midco.net or I can provide you with my regular mail address.
Thanks,
Sherry