1. H W Dickinson, James Watt: Craftsman & Engineer, Augustus M Kelly Publishers, New York, 1967.
2. G R Pennock, James Watt (1736–1819), in Distinguished Figures in Mechanisms and Machine Science, M Ceccarelli (Ed.), Springer, pp.337–369, 2007.
3. E A Cowper, On the Inventions of James Watt, and his Models Preserved at Handsworth and South Kensington, Institution of Mechanical Engineers, London, 1883.