WALLIS, John (1616-1703). A Treatise of Algebra, both Historical and Practical. London: J. Playford for R. Davis, 1685-84. 3 parts. Engraved portrait after Loggan, 10 folding engraved plates (occasional very light browning). FIRST EDITION. Wing W613, 565 & 614. [Bound with]: CASWELL, John. A Brief (but Full) Account of the Doctrine of Trigonometry, both Plain and Spherical. Ibid., 1685. This probably belongs to the Wallis although there is no mention of it on the general title. Wing C1252. 2 works in one volume, 2° (324 x 196mm). Early 18th-century calf, panels of spine and sides ruled in gilt (slightly worn, joints split). Provenance: unidentified late 18th-century French armorial bookplate -- From the Library of John Jackson (1793-1875) of Academy Place, Warrington (bookplate).