A method of self-enquiry
pioneered by Douglas Harding

Dilgo Khyentse Rinpoche (1919-1991)

His Holiness Dilgo Khyentse Rinpoche (1910-1991) was the head of the Nyingmapa Order. Originally from Shechen Monastary in Nepal, he rebuilt that monastary in Kham, Eastern Tibet, after building New Shechen Monastery in Kathmandu Valley. He was one of the greatest living lamas, scholars and teachers, and served as the Dzogchen teacher of the Dalai Lama. He was Surya Das's guru in the three year retreats in France during the 1980's.

From http://www.dzogchen.org/library/bios/dilgo.htm

See also wikipedia