1Enclosure: Christopher Leffingwell to John Chester, 30 August 1791 (Hamilton Papers)
Since forwarding Statement of Manufactories have discoverd an Omission of the Manufactoring of Carding Machines and Jennys for Carding & Spinning on the large Scale. Those in Mr Lathrops works were wholly made here by an Inhabitant of this Town who is a Great Mechanical Genius. Machines for Cutting doubling & Crooking Card wire for making Common Cotton & Wool Cards are also made in this Town....