flaxen thread

They were alone together, since Cadfael had returned to confirm Bénezet's testimony by the witness of Brother Matthew, who had carried the head end of the reliquary up the stairs, and tangled his fingers in the unravelling flaxen thread of the edging.

The shepherd himself, though he had good reason to believe that the bag held nothing but flaxen thread, or else the long rolls of strong linen spun from that thread, was not quite sure that this trade of weaving, indispensable though it was, could be carried on entirely without the help of the Evil One.