Hayanaratna · by Balabhadra
Chapter 1 · Planets, Signs, Year Entry
ग्रहराशिस्वरूपवर्षप्रवेशाद्यानयनाधिकारः
हिल्लाजेन तु ब्रह्मविष्णुरुद्रमुखनिर्गतशापेन यवनताम्प्राप्तेन श्रीसूर्येणैव यवनशास्त्रप्रणयनाद्द्विजानामपि सूर्यसिद्धान्तवत्तदध्ययनं युक्तमित्युक्तम्॥
But Hillaja has said this. The Sun himself became a Yavana through a curse from the mouths of Brahma, Vishnu and Rudra. And the Sun made the Yavana science. So, like the Surya Siddhanta, it is right for the twice-born to study it too.
Simple meaning: Hillaja's view: the Sun, cursed to be a foreigner, made the Yavana science, so Brahmins may study it like the Surya Siddhanta.
"केशवविष्णुमुखनिर्गतशापान्म्लेच्छाधिगततिग्ममरीचेः ॥
Hillaja's verse: the cursed Sun's teaching, received in Romaka city, is fit for Brahmins to study.
पुरे रोमकपत्तने ॥
A word note: the city is Romaka.
यदा च तदेव प्रमेयं केनचित्सुबुद्धिना समरसिंहादिना अधीतं तदीयं ज्योतिःशास्त्रेण दृढतरसंस्काराद्व्यक्तसंज्ञापरिभाषेण संस्कृतशब्दैरुपनिबद्धश्चेत्पठ्यते तदा न कोपि दोष इति ज्ञेयम् ॥
No fault: reading Samarasimha's Sanskrit Tajika is allowed.