To Miss S. Frances Leary, for the Michael Swope family notes.
To the late Mr. Charles Callahan, and to Mrs. Callahan, for permission to quote from Mr. Callahan's works and for many inspirational talks with Mr. Callahan.
To Captain George H. Evans for old photographs.
To Mrs. Arthur Herbert, for photographs of Herbert furniture from the Carlyle house.
To Mr. Courtland Davis, for generous aid and valuable Alexandria records and the use of his personal manuscripts and to Mr. Davis and the Reverend Doctor William B. McIllwayne, for access to the old Presbyterian meetinghouse session books.
To Miss Cora Duffy, for the records of the Sun Fire Company.
To Mrs. Margaret Gill Davis, for use of an old customs house journal.
To the late Mr. Ward Brown, for loan of architectural documents.
To Messrs. I.D. Matthews and Milton Grigg, for floor plans.
To Mrs. Howard Tolley, for the photograph of Dr. Brown and his obituary.