The Sarmoung Brotherhood is known only through Gurdjieff's own narrative in Meetings with Remarkable Men and the accounts of those who took the story from him. No traveller, ethnographer or historian outside that circle has independently located or documented such a body.
What would resolve this An independent nineteenth or early twentieth century record, travel account or local Central Asian source naming a body matching Gurdjieff's description, unconnected to Gurdjieff's own circle.
OpenCentral Asian history and the history of esoteric movementsJames Webb, The Harmonious Circle: The Lives and Work of G. I. Gurdjieff, P. D. Ouspensky, and Their Followers