Letter from C. Paisley to Francis Trevithick Regarding the Inventor of Locomotive Blast-pipe

Letter from C. Paisley (Major-General Charles Paisley, Inspector General of Railways) enquiring as to who invented the blast-pipe used for locomotive engines. ‘It is generally understood that Mr. Rob[er]t Stephenson first used or invented the blast pipe...’. (1 sheet/2pp.) With typed notes [late 1900s] by an unknown source.