Letter from Thomas Stanhope Bocock,Georgetown,  Washington, D.C. to Charles Lanman, Georgetown, Washington, D.C. with biographical information for inclusion in the Directory of the United States Congress. April 26, 1858.

Letter from Jo[hn] M[inor] Botts, Richmond, Virginia to Charles Lanman with biographical information for inclusion in the Directory of the United States Congress. September 2, 1858.

Letter from G.A. Williams, Moorefield, Virginia to Charles Lanman, Georgetown, Washington, D.C. giving biographical information on his father, Jared Williams, for inclusion in the Directory of the United States Congress. Bears testimonial letter from John H. Cassin.

Autobiographical material, 1858, compiled by William Leftwich Goggin concerning himself and sent to Charles Lanman for Dictionary of the United States Congress (Philadelphia, 1859).

Letter from John Thomas Harris to Charles Lanman with biographical information for inclusion in the Directory of the United States Congress.  October 27, 1859.

Letter from William Alexander Harris, Washington, D.C. to Charles Lanman, Georgetown, with biographical information for inclusion in the Directory of the United States Congress. December 10, 1858.

Letters, 1860, of John S. Millson (1808-1874), US Congressman, and autobiographical data submitted for Charles Lanman's Dictionary of the United States Congress.

James French Strother letter to Charles Lanman's Dictionary of the United States Congress where he gives autobiographical information. September 26, 1858.