Plans for marine instruments and vessels, correspondence, and research of Everett St. John, a twentieth century marine instrument and small craft designer based in southern Connecticut.

The collection contains miscellaneous receipts, deeds, franchises, leases, licenses, transfers, bills of sale, tax notices and returns, broadsides, correspondence, etc., involving oystering, primarily in the New Haven and Bridgeport, Connecticut, area. Oyster men featured are H. C. Rowe, A. E. Hamilton, Charles E. Hamilton, and Edwin Thompson. The collection also includes numerous pamphlets and articles relating to the oyster industry in general.