Anima Astrologiae or A Guide for Astrologers by William Lilly 1676

The 43rd is, If the Fortunes and Infortunes be together il-posited, that is, in some of the said Impediments, as Houses where they have no Dignities, Combust or the like; then whatever they signify ‘tis but weakly; according to that Aphorism of the Philosopher, “A Planet Retrograde and Combust, has no strength in Signification. The Fortunes when Combust and under the Sun ‘s beams, signify none or very little good; and the Infortunes in like case have little or no virtue to signify ill.” [An unfortunate should be regarded as having very evil signification under the circumstances.]

44.If the Significator be in his own House