Napier calculated no logarithms of numbers, and, as already stated, the logarithms invented by him were not to base e. The first logarithms to the base e were published by John Speidell in his _New Logarithmes_ (London, 1619), which contains hyperbolic log sines, tangents and secants for every minute of the quadrant to 5 places of decimals. In 1624 Benjamin Ursinus published at Cologne a canon of logarithms exactly similar to Napier's in the _Descriptio_ of 1614, only much enlarged. The interval of the arguments is 10´´, and the results are given to 8 places; in Napier's canon the interval is 1', and the number of places is 7. The logarithms are strictly Napierian, and the arrangement is identical with that in the canon of 1614. This is the largest Napierian canon that has ever been published. In the same year (1624) Kepler published at Marburg a table of Napierian logarithms of sines with certain additional columns to facilitate special calculations. The first publication of Briggian logarithms on the continent is due to Wingate, who published at Paris in 1625 his _Arithmétique logarithmétique_, containing seven-figure logarithms of numbers up to 1000, and log sines and tangents from Gunter's _Canon_ (1620). In the following year, 1626, Denis Henrion published at Paris a _Traicté des Logarithmes_, containing Briggs's logarithms of numbers up to 20,001 to 10 places, and Gunter's log sines and tangents to 7 places for every minute. In the same year de Decker also published at Gouda a work entitled _Nieuwe Telkonst, inhoudende de Logarithmi voor de Ghetallen beginnende van 1 tot 10,000_, which contained logarithms of numbers up to 10,000 to 10 places, taken from Briggs's _Arithmetica_ of 1624, and Gunter's log sines and tangents to 7 places for every minute.[11] Vlacq rendered assistance in the publication of this work, and the privilege is made out to him.