This collection is comprised of Benjamin Henry Latrobe's 23 journals written in ink script, with some sketches, describing his activities in Maryland, Virginia, New York, Louisiana, and Washington, D.C. from 1796-1820 as well as 19 bound volumes of letterbooks containing primarily business information from 1803-1817.

This collection contains correspondence, diaries, journals, accounts, newspaper clippings, and sketches all relating to Latrobe’s family and work in architecture and design.