His biographies include Robert Fulton (1913), John Wilkinson (1914), James Watt (1936) and Matthew Boulton (1937), and he also published a history of the steam engine (1939).[1][3] While at the Science Museum he was responsible for acquiring and displaying James Watt's engines, as well as the contents of his Handsworth workshop.[1][4][5] One of the founding members of the Newcomen Society in 1920, he was its president (1932–34), honorary secretary (1920–32, 1934–51) and the editor of its Transactions (1920–50),[1][3] the last described in Nature as "[h]is greatest work".[1][3][7] He published biographies of key figures in the Industrial Revolution, Robert Fulton (1913), John Wilkinson (1914), Richard Trevithick (with Arthur Titley; 1934), James Watt (1936) and Matthew Boulton (1937),[1][3][8] described by Arthur Stowers in his Oxford Dictionary of National Biography article as "definitive".[1] In 1927, with Rhys Jenkins, he published James Watt and the Steam Engine, described in his obituary in The Guardian as a "monumental volume".