Abstract The Hiram C. Holmes is housed in ten document boxes. The first five boxes contain general business bills, accounts, receipts, and other documents, chronologically arranged by month and year. Boxes 6-8 contain all the correspondence, mostly incoming, found in the collection. Arranged chronologically by day, month, and year, it has also been further organized into letters from the three companies Holmes did most of his business; papers concerning efforts to patent an improvement in gear axle...