Lama Chokyi Gyaltsen (Lama Mark Webber) has accepted an invitation on behalf of his students to lead a 3 week 'Great Perfection' Retreat at the Dharma Centre of Canada this fall. It will rely on the richness of the Drikung Dzogchen from the Yangzab Terma teachings of Tertӧn Rinchen Phuntsok (16th century), as well as,…