The Pendragon Banner by Sylvian Hamilton
Former crusader turned bone-pedlar Richard Straccan is up to his neck in trouble. The woman he loves has been accused of sorcery and is in mortal danger, but he cannot go to her. Nor can he abandon the stranger found unconscious in the street. He has lost his memory, so how can he defend himself against the charge of murder at a trial in which the only other witness is the corpse? Then there is the King, whose demands will lead Straccan into still greater peril. Straccan is trying to track down the Pendragon Banner, a priceless relic sewn by Guinevere for King Arthur, but it has been lost for seven hundred years. The trail is long cold, and there is opposition at every turn. For, hard on Straccan's heels is the brutal Breos, whose deadly secret Straccan accidentally stumbles on ...