Caleb Leach Papers

This collection contains the papers of American watchmaker and water-works builder Caleb Leach (1755-1837). The majority of the collection deals with Leach's invention, the screw auger, and his various business ventures. There is also some material related to Leach's family into the beginning of the 20th century. The collection includes business records, correspondence and other miscellaneous material.

The Business records include two account books, correspondence, receipts, bills, business contracts, documents dealing with several of Leach's projects including the Manhattan Company, and the water-works in Plymouth, Boston and Philadelphia, indentures, and contracts with manufacturers granting them exclusive rights to produce the augers. Several of these documents contain details about the screw auger and how it works, types of lumber used for the various projects, and the price of materials.

The Correspondence includes personal letters by various Leach, Tinkham, and Gale family members. There are also several postcards, miscellaneous items, newspapers and clippings and empty envelopes.