Anima Astrologiae or A Guide for Astrologers by William Lilly 1676

The 44th is, To consider if the Significators, Fortune or Infortune, be in his own House, Exaltation, Triplicity, Terms or Face (but the latter being not of that virtue with the rest, ‘tis necessary it should be assisted with another Dignity, which is Hayz or Light); for in such case the Infortune loses his sting; and being rein’d in like a wild horse from doing mischief, his malice is converted into good, and though this seems strange, yet the ancients affirm and I myself have often found it true by experience.

45.Whether Infortunes are in Angles of the Ascendant