The correspondence of Isaac Newton Volume VI 1713-1718. Edited by A. Rupert Hall and Laura Tilling. Published for the Royal Society by Cambridge University Pres.. 1976. Quarto. xxxvii, 499pp. 5 plates. All edges sprinkled red. A fine copy in the original burgundy cloth, gilt vignette to upper board, blue and gilt lettered printed label to spine. In the original dust wrapper, near fine. Newton's eighth decade of his life, and his controversy with Leibniz and the Calculus dispute continued to dominate his interest. Disputes with Flamsteed continued with his attempt to discredit the lunar equations of the second edition of the Principia, Flamsteed writing "now all those who would do any injury to the observatory have ruined their own credit". As with Leibniz, the regrettable animosities surrounding Newton pursued him throughout life, and long after his opponent's death. Support for Newton against Flamsteed came from the Tory Oxford, who consequentially became involved in the longitude business. The documents included here show that Newton believed that the primary determination of longitude could only be effected by an astronomical method: "Clockwork may be subservient to Astronomy".