This is from Alla's:
He has three known PHs in the building just north of the zone-in (PHs are "a sub archon of alsa thelara" or "a blade mentor of alsa thelara"):
One PH in the room to the left of Therin the Ancient
Two PHs in the rooms to the right of Therin the Ancient (one in Planner Vanseth's room; the other with Thelasa Eselren)