Abstract William Orr was a partner in the Poindexter and Orr Livestock Company in Dillon, Montana. Collection (1902-1971) includes ranch records; business and fraternal papers of Orr's son John T. Orr, including the Orr photographic studio; correspondence of Orr's grandsons John Orr, Jr. and Matt Orr during World War II; and records of family activities in DeMolay, PEO, Delphians, etc. [Photographs, artifacts, and printed materials transferred to the Photograph Archives, Museum, and Library...