Great Exhibition of 1851. Features 'James Watt & Co. (Late Boulton, Watt & Co.) of London, and Soho, Birmingham; manufacturers of marine, land & pumping engines, sugar mills, & mint machinery'. Endorsed on rear "G[rea]t. Exhibition - description of our work [?]" [written by James Brown ?] Leaflet describes engines and their specifications as displayed at the Exhibition.