Autograph Letter Signed, to a ‘Signor Secretario’, referring to his books and to a scientific congress in Norwich. In Italian. 8 x 5 inches, ink blot across a few letters of the signature, otherwise good. Florence, 7 August 1868. Cristoforo Negri (1809-1896), Italian politician and writer, the first president of the Italian Geographical Society (1867-1872).