Historian and lawyer of Maryland. Correspondence and other material pertaining to John Leeds Bozman, John Leeds Kerr, John Bozman Kerr, J. S. Bozman, William Vans Murray, Daniel Carroll (1730-1796), and others.

Lawyer, author, and diplomat. Correspondence, letterbooks, addresses, lectures, legal memoranda, memorabilia, scrapbooks, printed matter, and other papers relating primarily to Choate's student days at Harvard University, his law practice in New York, his charitable work, and his diplomatic career.

A corporate enterprise formed to build the first trans-Isthmian canal across Central America. Chiefly survey notebooks concerning the nature, depth, and suitability of the rivers and waterways of Nicaragua for purposes of a canal. Also includes issues of the Canal Record, an American newspaper published in the Panama Canal Zone.