Hayanaratna · by Balabhadra
Chapter 1 · Planets, Signs, Year Entry
ग्रहराशिस्वरूपवर्षप्रवेशाद्यानयनाधिकारः
लग्नाद्याः संधिसहिता भावाः षड्राशिसंयुताः ॥सप्तमाद्या भवंतीह भावाः सर्वे ससंधय इति ॥
The houses from the lagna (rising sign), with their sandhis (junctions between two houses), plus six signs, are the houses from the 7th. So all the houses come with their sandhis.
Simple meaning: Houses 7 to 12: add six signs to houses 1 to 6 and their junctions.
अथ केवललग्नज्ञानादेव सकलभावराशिसाधनार्थं सुगमोपायो मत्कृत
Easy method for all houses: find the rising sign's day-length difference and take it from 15 (rising sign Aries to Virgo).
तुलादिषड्भैः सहिताः प्रकल्प्यास्तेंशकाः पुनः॥
Easy method: (rising sign Libra to Pisces) add the difference to 15 instead. Use that number as degrees and add it to the rising sign: the 1st…
तैर्युतो लग्नसंधिश्च धनभावो भवेदिह॥
Easy method: add the same step again for the 2nd house and the 2nd junction.