The collection consists of three small diaries written daily by Alpheus B. Kenyon in 1864, 1865 and 1866 when he was living with his parents and his brother, Myron, in the Old Field Section of West Mystic.

The Records of the Mystic Shipyard contains over 25,000 pieces of manuscripts filed in 66 document boxes, plus 31 volumes of business records.

This small collection is essentially the business papers of William Smyth, created during his time at the Dauntless and Mystic Shipyards, 1927-1971. Included are yard financial reports, meeting notices, clippings, and business correspondence, all arranged in chronological order.