Miracles at his grave and in connection with his relics brought pilgrims in great numbers , and the abbey developed into the greatest Augustinian house in the north .
Abbot William died on 6 April 1203 at the age of 75 .
Miracles at Abbot William 's grave and in connection with his relics brought pilgrims in great numbers , and the abbey developed into the greatest Augustinian house in the north .
Abbot William died on 6 April 1203 at the age of 75 .