In Three Parts : Containing the Marine Telegraph System, with the Appendix, the United States Telegraph Vocabulary, and Embracing Marryatt's Telegraph Signal Numbers, as Adopted by the British and French Governments, at Lloyd's Coffee House, London, and Used at the Liverpool and Holyhead Telegraph Stations, the Whole Adapted to the Use of the Semaphoric Telegrah, and Marine Telegraph Flags, Comprising in the Aggregate, Twelve Thousand Vessels' Designating Telegraph Numbers