To the English gentrie, and all others studious of the mathematicks : which shall bee readers hereof. The just apologie of Wil: Oughtred, against the slaunderous insimulations of Richard Delamain, in a pamphlet called Grammelogia, or the mathematicall ring, or mirisica logarithmorum projectio circularis. - Oughtred, William (A. Mathewes, 1634)