Wedgwood's 'Patent Manifold Writer for copying letters', 1834.

The instrument, similarly to the 'noctograph', produces copies of letters while they are written by means of 'carbonated paper', made by soaking paper with printers' ink., fitted in the writing frame between two sheets of plain paper, a metal stylus being used to transfer the ink onto the plain paper. The advertisement is aimed at soliciters, bankers, MPs, merchants, and others who find it useful to retain copies of their correspondance. The handbill is signed by Ralph Wedgwood of 84 Ludgate Street.