On 14 Jan 1476 John Mowbray 4th Duke of Norfolk (age 31) died at Framlingham Castle, Suffolk [Map]. Suspicious since he was only 32? Duke Norfolk, Earl Surrey and Earl Nottingham extinct. His daughter Anne Mowbray 8th Countess Norfolk (age 3) succeeded 8th Countess Norfolk, 11th Baroness Mowbray, 12th Baroness Segrave and inherited the vast Mowbray estates. She was subsequently married to Richard of Shrewsbury 1st Duke York (age 2) two years later.