Subject: Forensic sciences

Billhead from December 1, 1897, issued by David N. Carvalho, advertising his services as an "EXPERT EXAMINER AND PHOTOGRAPHER OF QUESTIONED HANDWRITING." The bill was sent to the District Attorney's Office at 265 Broadway. Carvalho's office and laboratory address is also listed. The billhead notes that David N. Carvalho is the son of Solomon N. Carvalho.

Memorandum from Ferdinand Levy, Coroner's Office of New York, to George Randorf, Esq., referencing an enclosed self-explanatory letter. Written on letterhead from the Coroner's Office, 67 Park Row, New York, NY. Dated July 15, 1890.