David, T. Yeomans (1986). “Early Carpenters’ Manuals 1592-1820.” Construction History, vol. 2, pp. 13–33. JSTOR, www.jstor.org/stable/41613617
On page 29 it says: “His range of books also suggests the development of a demand for text books among a more formally educated group of architects, because he published a three volume Principles of the architecture (1795-8) which dealt with geometry, mensuration and the orders of architecture and in 1795 he produced a small work on the orders addressed particularly to students.”
Joseph, Gwilt (1876). An Encyclopaedia of Architecture, Historical, Theoretical, and Practical. London: Longmans, Green, page xii (12)