Correspondence, account books, plantation and slave records, memoranda books, financial papers, and legal papers. Topics include activities at the Savannah Poor House and Hospital, the care and treatment of a mental patient, work of the United States Army Corps of Engineers on the Savannah River, the Seminole War, plantation life, trips to the Virginia springs, women's education, and the impact of the Civil War.
Volumes are chiefly merchantile and plantation records.
Mackay, Eliza McQueen, 1778-1862. Mackay, John, 1805-1849. Mackay, Mary Anne, 1803-1862. Mackay, Robert, 1772-1816. Mackay, William Mein, 1804-1865.