David Templeman has published an article about Buddhaguptanath and Late Indian Siddha Tradition, "late" means 1400's. Buddhaguptanath was teacher of Jetsun Taranatha, he also traveled extensively, visiting Indonesia, Afghanisthan (which is Urgyen in his opinion), and Madagaskar! His travel diary is interesting to read.
In 1970's several authors placed Urgyen in Afghanishtan rather than in Pakistan. Since then Urgyen has usually been placed in Orissa, Pakistan. It is refresing to hear that in 1400's it was in Afghanisthan. Here:
http://www.ordinarymind.net/may2003/feature2_03.htm

