The Padmakara Translation Group's Wulstan Fletcher discusses the Nyingma material, in particular that in the second volume, of the eighteen volume Treasury of Precious Instructions compiled by Jamgön Kongtrul Lodrö Taye. This is a combination of the Heart Essence of Vimalamitra and the Heart Essence of the Dakinis. This includes works by Garab Dorje, Mañjuśrīmitra, Śrīsiṃha, Jñānasūtra, Longchenpa, Jamgön Kongtrul Lodrö Taye, and Guru Padmasambhava,
Fletcher translated this volume with Helena Blankleder.