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I had asked some questions to Pandit Nathuramji Premi and Pandit Jugalkishoreji Mukhtar regarding topics related to Umasvati and Tattvartha. The main essence of the responses received from them is presented below in their own words along with my questions. In the present era, the scholarly qualifications of both these individuals in the field of Digambara tradition have been of a high caliber. Therefore, I am providing their thoughts here as an appendix for the readers' benefit. The portion of Pandit Jugalkishoreji's answer to which I have some remarks has been addressed under the title "My Thoughts" following his letter (see page 76).
(1) Question 1: What is the earliest mention of Umasvati being a disciple or descendant of Kundakunda in any text, pattaavali, or inscription that you have come across? Or, put differently, in which text, pattaavali, etc., prior to the tenth century do we find the claim of Umasvati being a disciple or descendant of Kundakunda?
(2) In your opinion, what period does the revered Pujyapad belong to? Do you believe the Shvetambara commentary on Tattvartha is self-evident or not? If it is not self-evident, what are the significant arguments in that regard?
(3) Was there ever a branch named 'Uchchha Nagar' in the Digambara tradition, and was there ever a group of monks who were known as 'Vachaka' or held the Vachak title in ancient times? If so, where is its description or mention?
(4) I doubt that the author of Tattvarthasutra, Umasvati, was a disciple of Kundakunda, as I have not yet found any ancient evidence for this. All the evidence I have encountered so far dates from after the twelfth century. Therefore, please write down whatever comes to mind in a general sense.
(5) What ancient evidence exists prior to the tenth century to support the belief that the famous Tattvarthashastra was composed by Umasvati, a disciple of Kundakunda?