Furfur’s truthful speech depends on constraint. The fiery-tailed stag takes an angel’s form within the triangle, then answers secret and divine questions in a hoarse voice; love and violent weather are also within his office. [1]
The great earl Furfur appears as a hart—a male deer—with a fiery tail. He never speaks truth unless compelled or brought within a triangle. There he assumes an angel’s form; when bidden, he speaks hoarsely. True answers about secret and divine matters are likewise conditional on command. [1]
He urges love between man and woman and raises lightning, thunder, blasts and great storms. Twenty-six legions are under him. [1]
Man and wife in Scot
Scot restricts his truth condition explicitly to being brought within a triangle and makes the angelic form follow a command. His love office concerns man and wife, where the Goetia says man and woman. The later notice also expressly names great tempestuous storms alongside the lightning, thunder and blasts. [1][2]
S. L. MacGregor Mathers, translated; Aleister Crowley, edited, The Book of the Goetia of Solomon the King (1904), first-edition facsimile supplied by Keep Silence. Shemhamphorash, entry 34; printed p. 21, PDF p. 18
Reginald Scot, The Discoverie of Witchcraft (1584); Brinsley Nicholson’s reprint of the first edition (1886), Project Gutenberg transcription. Book XV, chapter II, Furfur; 1886 reprint page 320