 Complete the following phrase:  Michael Hicks has noted that Buckingham was one of the few Lancastrian loyalists who was never accused by the Yorkists of being an evil councillor, even though he wasin Hickss wordsthe substance and perhaps the steel within the ruling regime. Although Buckingham was not attainted when the Duke of Yorks son, the Earl of March, took the throne as King Edward IV in 1461, Buckinghams grandson Henry became a royal ward, which gave the King control of the Stafford estates during the young dukes minority. Henry Stafford entered into his estates in 1473 but was executed by Edwards brother Richardby then King, and against whom 