Alexander Gordon, Dictionary of National Biography… (1891)
“ Predestination,’ &c., 1710, 4to. 42. ‘Wisdom to the Wicked,’ &c., 1710, 8vo. 43. ‘Free Thoughts,’ &c., 1711, 4to (continuation of No. 40; a further issue was projected) . 44. ‘A Daily Morning Prayer,’ &c., 1712 (Calamy) . Some other pamphlets and single sermons are referred to by Calamy. Many of his publications bear only his initials. He seems always to spell his name Humfrey; by others it is given as Humphrey or Humphries. He was confused with John Humphreys, an astrologer, born in 1638 at Shrewsbury, and educated at Cambridge ”
