Thomas Allen (or Alleyn) (21 December 1542 – 30 September 1632) was an English mathematician and astrologer. Highly reputed in his lifetime, he published little, but was an active private teacher of mathematics. He was also well connected in the English intellectual networks of the period.

Sir Kenelm Digby was an English courtier and diplomat. He was also a highly reputed natural philosopher, astrologer 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 the Ornament of this Nation".