This collection consists of one letter book, containing copies of letters written by Dugald S. Laidlaw between 25 November 1844 and 26 June 1846. Laidlaw was an English businessman, charged with overseeing the management of several sugar plantations on the island of Dominica in the British West Indies.

This collection consists of one letterbook containing ten long letters from an anonymous Philadelphian to his friend, Ned, written between 1826-1827. The author, a crew member on the frigate Brandywine, vividly and poetically describes life on board the ship and ashore in South America.

The letterbook of David Bigelow Parker consists of 494 pages of correspondence with two letters laid in covering the years 1876 to 1879. These letters were written by Parker in his capacity as Chief Special Agent, Division of Mail Depredations at the Post Office Department in Washington, D.C.