The carpenter's and joiner's repository, or, A new system of lines and proportions for doors, windows, chimnies, cornices & mouldings, for finishing of rooms, &c. &c. : a great variety of staircases, on a plan entirely new, and easy to be understood : circular circular [sic] soffits, slewing and winding, in strait and circular walls, groins, angle brackets, circular and elliptical skylights, and the method of squaring and preparing their circular bars, shop fronts, &c. (1778)
Pain, William, 1730?-1790? · London : Printed for the author, and sold by I. Taylor ... · leaf 115
Carpentry -- Early works to 1800 · Joinery -- Early works to 1800 · Architecture -- Details -- Early works to 1800 · Decoration and ornament, Architectural -- Early works to 1800
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.