send able Mathematicians to Sea, it would signify much more to the improvem^t of Navigation and safety of Mens lives and estates on that element.[144] May Oughtred prove as instructive to the modern reader as he did to Newton! Footnotes [1]Aubrey’s Brief Lives, ed. A. Clark, Vol. II, Oxford, 1898, p. 106. [2]“To the English Gentrie, and all others studious of the Mathematicks, which shall bee Readers hereof. The just Apologie of Wil: Ovghtred, against the slaunderous insimulations of Richard Delamain, in a Pamphlet called Grammelogia, or the Mathematicall Ring, or Mirifica logarithmorum projectio circularis” [1633?], p. 8. Hereafter we shall refer to this pamphlet as the Apologeticall Epistle, this name appearing on the page-headings. [3]Companion to the [British] Almanac of 1837, p. 28, in an article by Augustus De Morgan on “Notices of English Mathematical and Astronomical Writers between the Norman Conquest and the Year 1600.” [4]New and General Biographical Dictionary (John Nichols), London, 1784, art. “Oughtred.” [5]Rev. Owen Manning, History of Antiquities in Surrey, Vol. II, p. 132. [6]Skeleton Collegii Regalis Cantab.: Or A Catalogue of All the Provosts, Fellows and Scholars, of the King’s College . . . . since the Foundation Thereof, Vol. II, “William Oughtred.” [7]Aubrey, op. cit., Vol. II, p. 107. [8]Rigaud, Correspondence of Scientific Men of the Seventeenth Century, Oxford, Vol. I, 1841, p. 5. [9]Aubrey, op. cit., Vol. II, p. 110. [10]Ibid., p. 111. [11]Op. cit., Vol. II, p. 132. [12]Mr. William Lilly’s History of His Life and Times, From the Year 1602 to 1681, London, 1715, p. 58. [13]Rigaud, op. cit., Vol. I, p. 60. [14]Aubrey, op. cit., Vol. II, p. 107. [15]Rigaud, op. cit., Vol. I, p. 16. [16]Owen Manning, op. cit., p. 132. [17]New and General Biographical Dictionary (John Nichols), London, 1784, art. “Oughtred.” [18]Op. cit., Vol. II, p. 110. [19]Rev. Owen Manning, The History and Antiquities of Surrey, Vol. II, London, 1809, p. 132. [20]Op. cit., Vol. II, 1898, p. 111. [21]Budget of Paradoxes, London, 1872, p. 451; 2d ed., Chicago and London, 1915, Vol. II, p. 303. [22]The full title of the Clavis of 1631 is as follows: Arithmeticae in numeris et speciebvs institvtio: Qvae tvm logisticae, tvm analyticae, atqve adeo totivs mathematicae, qvasi clavis est.—Ad nobilissimvm spectatissimumque invenem Dn. Gvilelmvm Howard, Ordinis qui dicitur, Balnei Equitem, honoratissimi Dn. Thomae, Comitis Arvndeliae & Svrriae, Comitis Mareschalli Angliae, &c filium.—Londini, Apud Thomam Harpervm. M.DC.XXXI.