the Crystal Cave Chronicles of Padmasambhava; {u rgyan gu ru padma 'byung gnas kyi skyes rabs rnam par thar pa rgyas par bkod pa}; a biography of the Mahaguru Padmasambhava, said to have been discovered; by {u rgyan gling pa} at {shel gyi brag ri'i rdzong} in the {yar klungs} valley