sentences:  By the time of her marriage, Mary was fatherless and poor but gave her parents-in-law ‘much joy in his choice’.She left four sons, of whom the eldest, William (1573-1637), 2nd Lord Petre, was father of William Petre (1602–1677).He probably erected the beautiful recumbent tomb of Sir William, and is himself commemorated by the magnificent one in the north chapel, now the vestry.