Rigdzin Jigme Lingpa and the Longchen Nyingthig
Rigzin Jigme Lingpa (1730-1798) further condensed the Nyingthig Yabzhi of Longchenpa into a cycle of termas called the Longchen Nyingthig, or "Heart Essence of the Vast Expanse". The Nyingthig Yabshi and the Longchen Nyingthig are known, respectively, as the earlier and later "heart essence." The Longchen Nyingthig became both the foundation of the main Dzogchen teachings in the contemporary period and of the Rime’ movement.
Jigme Lingpa's teaching lineage flourished in Kham in eastern Tibet, and after his death three important teachers were recognised as being his emanations: Do Khyentse (1800?-1859?), Jamyang Khyentse Wangpo, (1820-1892) and Patrul Rinpoche, (1808-1887), all of whom were central to the Rime’ movement.
H.H. Chatral Rinpoche received the Longchen Nyingthg from Kathok Khenpo Ngawang Palzang, and transmitted it to the Ven. Ralo Rinpoche.