At the back site of the thangka is written complete terma "Vajra Bridge" opened by Chogyal Namkhai Norbu with signs of blessings.
This thangka of Ngondzog Gyalpo shows Anuyoga aspect of Tantra, as it was practiced and achieved enlightenment by Pam Mipham Gompo, outstanding VIII century yogi of Tibet. Here he is shown in a cave, in glowing radiance of light.
Top image right is Vairochana, translator and disciple of Guru Padmasambhava, who gave instructions of the Longde practice to Pam Mipham Gompo.
At the bottom there are two tigles showing seed syllable of this practice and the beginning of the terma «Vajra Bridge» opened by Chögyal Namkhai Norbu and connected with these teachings.
The thangka was painted according to the oral transmission and great help of Chögyal Namkhai Norbu.