Hayanaratna · by Balabhadra
Chapter 1 · Planets, Signs, Year Entry
ग्रहराशिस्वरूपवर्षप्रवेशाद्यानयनाधिकारः
तैर्युक्तो धनसन्धिश्च भ्रातृभावो भवेत्स्फुटम् ॥तैस्संयुतो भ्रातृभावः सन्धिस्स्यात्सहजाभिधः॥
The 2nd sandhi (junction between two houses) plus those degrees is the true 3rd house. The 3rd house plus those is the sandhi called the 3rd.
Simple meaning: Easy method: keep adding the step for the 3rd house and the 3rd junction.
तृतीयसन्धिस्तैर्युक्तस्तुर्यभावः प्रजायते ॥
Easy method: one more step gives the 4th house; the rest as before.
भावविचारफलमुक्तंश्रीमन्नीलकण्ठदैवज्ञैः ॥
Same verse as Tajika Nilakanthi 1.28; see its meaning there.
अन्यत्रापि ॥
Planet outside a house's junctions: before the first junction, the earlier house; past the last, the next house.