Kenelm Digby studio of Anthony Van Dyck ( 22 March 1599-9 Dec.1641) Sir Kenelm Digby (11 July 1603-11 June 1665) was an English courtier and diplomat. He was also a highly reputed natural philosopher, and known as a leading Roman Catholic intellectual and Blackloist. For his versatility, he is described in John Pointer's Oxoniensis Academia (1749) as the "Magazine of all Arts and Sciences, or (as one stiles him) the Ornament of this Nation".