Pardon me - but what "ritual"??? There was a post a couple of months back concerning a fire (lit by some Australian pilgrims) that escaped. So is this ritual a modern event or did the pilgrims of the 11th / 12th Century "really" do this???
BTW - happy for the " sisters" to have shared their camino experiences.
No, medieval pilgrims' clothes were burnt on the roof of the cathedral in Santiago - the stone incinerator is still there, if you do the tour of the roof it will be pointed out. The burning of clothes at Finisterra is recent.