Daivajna Vallabha · Attributed to Varahamihira
Chapter 14 · Miscellaneous Questions
प्रकीर्णाध्यायः
राशिं लग्नं प्रवदेच्छेषैर्युग्मं सितज्ञजीवानाम् ।कुजरविजयोश्च नैवं रविशशिनोरेकराशित्वात् ॥ ३१ ॥
With the other letters, tell the planet's even sign as the rising sign. This holds for Venus, Mercury and Jupiter, and for Mars and Saturn. It is not so for the Sun and the Moon, because each has only one sign.
Simple meaning: Other letters give the planet's even sign. The Sun and Moon have one sign each, so this does not apply.
अकचटतपयशवर्गा रविकुजसितसौम्यजीवसौरीणाम् ।
Each planet has a group of letters. Look at the first letter spoken in the question.
ज्ञात्वा तस्माल्लग्नं संगृह्य शुभाशुभं वदेत्प्रष्टुः ।
If the first letter is 1st, 3rd or 5th in its group, the planet's odd sign rises.
तस्मात्प्राग्वत्प्रवदेत्पृच्छासमये शुभाशुभं सर्वम् ।
Use this letter method when the time of the question is not known.