Dilgo Khyentsé Tashi Paljor
Khenpo Tsondru's brief biography of his own teacher Pema Tekchok Loden (1879–1955), alias Khenchen Abu Lhagang, tells how he studied under some of the most illustrious masters of his day before serving as abbot for eight years at the famed monastic college of Dzogchen Śrī Siṃha and then retiring to a nearby cave, focusing on meditative practice.
Tenzin Lungtok Nyima
Pema Tekchok Loden was a twentieth-century Nyingma master from Kham. He was educated at
Śrī Siṃha College at Dzogchen Monastery, where he served as the twentieth abbot, from 1904 to 1912. He spent the last four decades of his life in retreat in a cave above Dzogchen.