 They remained in Tibet for six months, returning to Darjeeling with a large collection of Tibetan and Sanskrit texts which would become the basis for his later scholarship.Sarat Chandra spent 1880 in Darjeeling poring over the information he had obtained.In November 1881, Sarat Chandra and Ugyen-gyatso returned to Tibet, where they explored the Yarlung Valley, returning to India in January 1883.