Abstract: In 1979, Walther Heissig published an article describing two manuscript folios kept at the Herzog August Bibliothek: one of them contains text fragments in Tibetan and Mongolian, the other one, text in Tibetan only. Heissig proved that these folios were the first manuscripts of this kind in Germany, brought there from Russia, where they had been found at Ablai Keyid on the River Irtysh. The present study goes further in refining some of these data: the history of the folios is elaborated, the text fragments are attributed. Above all, the study demonstrates an unquestionable codicological resemblance between the folios and the Golden Kanjur of Ligdan Khan, establishing a connection between these manuscripts.