xl ÅRYÅBHATÎYA अध्यात्मविद्यामुपदेशयन्तं दृढं प्रपन्नाय धनञ्जयाय । प्रतोदहस्तं प्रगृहीतरश्मिं देवं प्रपद्ये वसुदेवसूनुम् ॥ स्कन्धत्रयार्थविदुषा सूर्यदेवेन यज्वना । मानसाख्यग्रहज्ञानवासनाऽऽद्य प्रकाश्यते ॥ The work ends with the verse : इत्थ मानसकरण व्याख्यात सूर्यदेवसोमसुता । श्री-सूर्यदेवनाम्नो मातृभ्रातुः प्रसादेन ॥ followed the colophon : इति श्री-सूर्यदेवसोमसुत्-विरचिते मानसव्याख्याने ग्रहोदयास्तमयाधिकारश्चतुर्थ: । सम्पूर्णमिदं मानसव्याख्यानम् । 2. Its date The date of composition of this commentary should be about A.D. 1248, as could be presumed from the author indicating this date as the starting point for the computation of the planets and giving as zero-corrections the planetary positions at this date. Thus he says : अत्र ध्रुवकनिबन्धनप्रकारदर्शनाय मानसाख्यकरणप्रतिपादितयुगणादिमध्यमानयनगणितद्युगणादे: कालदैघ्र्यकृतार्वषम्यप्रदर्शनाय च 'खागेश'मिते शककाले (Saka 1170=A.D. 1248) 81strficiatist: satira (Upodghata-prakarana to the com., vs. 5). Further down, in the same section, Suryadeva lays down the same in six verses : अथ अस्मदीय-ध्रुवकनिबन्धनार्यासूत्राणि प्रदश्र्यन्ते ‘खागेश'मिते शाके चैत्रावी जीवदिन दले भादि: ॥ etc. Since he wrote the commentary towards A.D. 1248, Suryadeva (b. 1191) should have composed it when he was 57 years old. 3. Aim of the commentary Towards the beginning of the Introductory Section (Upodghataprakarana) prefixed to his commentary, Suryadeva refers to an earlier commentary by Prasastidhara (c. A.D. 10th cent.), a Kashmirian astronomer on the Laghumanasa' and adds that though Prasastidhara 1. A ms. of this com. is available in the Sarasvati Bhandar of the Sanskrit College, Mysore, being Ms. No. 739, in Grantha script, and another in the Calcutta University Library.
