Thomas Whittaker

“ Two letters of Briggs to Ussher are in 'Archbishop Ussher's Letters,' Nos. 4 and 16, London, 1686, folio. In the first of them (dated August 1610) he describes himself as being engaged on the subject of eclipses: and in the second (10 March 1615) as being 'wholly employed about the noble invention of logarithms, then lately discovered.' On hearing of Napier's discovery he had been struck with enthusiasm, and in 1616 he went to Scotland to visit Napier. ”

“ BEDWELL, THOMAS (d. 1595) , mathematician and military engineer, matriculated as a sizar of Trinity College, Cambridge, in November 1562. He became a scholar in the same year; in 1566-7 he took the degree of B.A. ”

“ George Hakewill) . 'Arithmetica Logarithmica,' London, 1624. 'Trigonometica Britannica,' London, 1633. These two are Briggs's greatest works. The second was left unfinished by him, but was completed and published by his friend Henry Gellibrand, professor of astronomy at Gresham College. They are both works of enormous labour. The first, for example, 'contains the logarithms of 30,000 natural numbers to fourteen places of figures, besides the index' (see Hutton's Mathematical Dictionary) . ”