STEVENSON, Robert Louis (1850-1894). Autograph letter signed ("Robert Louis Stevenson"), to his publisher John B. Day. N.p., 30 June 1893. 1 page, 8vo, some browning and staining, creased at fold, pencil notation in an unidentified hand on upper left corner. Explaining a delay in travel plans due to influenza, and promising to inquire on behalf of Day's son once he is abroad. "I am unfortunately confined to the house by influenza, but so soon as I shall be able to go abroad, I shall institute inquiries for you son, and hope by next mail-or the mail after-to give you some intelligence."