London, Wellcome Institute MS. 2101. 2 folios +92 pages. 230x170mm. 17th Century [c. 1690.] Des principes de la nature en Général, et particulièrement du premier qui est l'esprit Général du Monde. [From Julius Kohn Library. A note by Kohn, states that this MS. was printed at Frankfort in 1750 under the title of 'Eröfnetes Philosophisches Vater-Herz']