Business papers, including correspondence, bills, and accounts, relating to lumber shipments received by Cogswell, who provided lumber for home construction and shipbuilding, chiefly from suppliers in Maine. Numerous companies and vessels are mentioned, including the schooner HANNAH CLARK and the schooner BOXER.

The William H. Webb collection consists of a selection of folio plates removed from a copy of the book "Wooden Vessels built by William H. Webb in the City of New York, 1840-1869." Plates depict commercial, military and recreational designs by William H. Webb and vessel designs by other naval architects including Henry Eckford and Samuel Humphreys as well as non-vessel material.