16mo. [6], 272 [i.e. 274]pp, [12]. Without initial blank leaf. Title in red and black. Later half-calf, marbled boards, recently rebacked preserving black calf lettering-piece. Boards rubbed. Armorial bookplate of The Law Society to FEP, with their occasional ink-stamps throughout, title page laid down, paper repair to initial leaf of text with some loss of text and sense, scattered spotting.

The first edition in English of seven casuistical lectures on the nature of oath giving delivered by Church of England clergyman Robert Sanderson (1587-1663) at Oxford University during Michaelmas, 1646. First published in 1647 as De Juramenti Promissorii, this edition was purportedly translated by Charles I whilst a prisoner on the Isle of Wight.