Hayanaratna · by Balabhadra
Chapter 1 · Planets, Signs, Year Entry
ग्रहराशिस्वरूपवर्षप्रवेशाद्यानयनाधिकारः
षडंशसंयुतः सन्धिस्तृतीयो भाव उच्यते ॥षडंशाढ्यस्तृतीयः स्यात्सन्धिर्भ्रातृचतुर्थयोः ॥
The sandhi (junction between two houses) plus the sixth part is called the 3rd house. The 3rd plus the sixth part is the sandhi of the 3rd and 4th.
Simple meaning: 3rd house: 2nd junction plus the step. 3rd junction: 3rd house plus the step.
तृतीयसन्धिरेकाढ्यस्तुर्यसंधिर्भवेदिह ॥
4th junction: 3rd junction plus one sign. 5th house: 3rd house plus two signs.
आढ्यो द्वितीयसंधिः स्यात्संधिः पञ्चमभावजः ॥
Houses 5 and 6: the 5th junction comes from the 2nd junction (the number of signs is not given); 6th house: 2nd house plus four signs; 6th junction…
लग्नाद्याः संधिसहिता भावाः षड्राशिसंयुताः ॥
Houses 7 to 12: add six signs to houses 1 to 6 and their junctions.