Gulielmi Oughtred Ætonensis quondam collegii regalis in Cantabrigia socii, clavis mathematicæ denuo limata, sive potius fabricata. Cum aliis quibusdam ejusdem commentationibus, quæ in sequenti pagina recensentur. Editio quinta auctior & emendatior. Ex recognitione D. Johannis Wallis, S.T.D. Geometriæ professoris saviliani - Oughtred, William 1575-1660 (typis Leon. Lichfield: impensis Tho. Leigh ad insigne pavonis juxta ecclesiam S. Dunstani, Lond, 1698)
Reproduction of the original in the British Library. - Wing (2nd ed.), O577. - With a table of contents