This collection includes a subgroup containing Philip R. Barbour's personal correspondence and legal documents, and another containing his historical research files. There are subgroups for George H. and Susan R. Barbour, Raleigh W. Barbour, Susan Barbour Page, William B. and Medora T. Raleigh, Walter W. and Clara B. Raleigh, Albert C. Raleigh, Margaret Raleigh Havard, and Katherine Hartt. There are also subgroups for four Rimini mining companies: Montana Lead, Inc., and its predecessors Lee Mountain Mine, Red Mountain Consolidated Mining Company, and Valley Forge Mining Company. In addition, there are smaller subgroups for the Montana Club, for the Sterling and Muffly law firm, and for John Woodruff, a Rimini miner.