 He had a reputation for his knowledge of astronomy and physics, and was a friend of John Dee and Thomas Allen.Heth denounced the astrological predictions of Richard Harvey in "Manifest and Apparent Confutation of an Astrological Discourse lately published to the discomfort (without cause) of the weak and simple sort".With the "Confutation" was bound up his "Brief Prognostication or Astronomical Prediction of the Conjunction of the two superiour Planets Saturn and Jupiter, which shall be in 1583, April 29", London, 1583.