Anima Astrologiae or A Guide for Astrologers by William Lilly 1676

The 90th is to Consider, Whether the Lord of the House in which the Sun is, and of that wherein the Moon is, and also the Lord of the Ascendant be all oriental and in Angles (though that rarely happens), and mutually behold each other from good places with friendly Aspect; for these positions shall signify the greatest good, and most superlative future imaginable. If they shall not be all so disposed, the remaining part shall signify prosperity and felicity proportionally as far as they are able, though not in so vast a measure.

91.Whether Mars be in an Angle