The Mason & Hamlin Company was formed in 1854 from the partnership of Henry Mason and Emmons Hamlin. Originally, the Boston-based company manufactured only melodeons; however, production rapidly expanded to include the American cabinet organ and eventually the piano. By 1874, the firm, having outgrown its Boston location, relocated to a larger factory on Brewery and Broadway Streets in Cambridgeport. By the turn of the century, the company – which employed 400 workers – was capable of producing ten thousand organs and fifteen hundred pianos each year (Gilman, 1896).