Yorkist His service to the
House of York began in 1459 when the future Edward IV and his Neville relatives, fleeing the disastrous
Battle of Ludford Bridge took refuge with his mother, for which Edward later rewarded her; John himself bought the ship on which they fled to Calais. He was attainted by the Coventry Parliament and led two successful raids against the royal forces at
Sandwich, Kent. During the first raid, he captured Baron Rivers, Richard Woodville (later
Richard Woodville, 1st Earl Rivers), thus producing the (in retrospect) comical scene where Rivers was humiliated for his low birth by his future son-in-law, King
Edward IV.
Under Edward IV He was made
High Sheriff of Devon and
Lord Chancellor of Ireland in 1460. After Edward IV's accession, he became a member of the
privy council and was created
Baron Dynham in 1467, although no grant of lands accompanied the title, as was usual. Ross suggests that he did not become a leading figure in government until the death of
Humphrey Stafford, Earl of Devon. During the years of crisis from 1469 to 1471, Dynham remained wholly loyal to Edward, and following Edward's return to power became one of the foremost members of the Government; he was Commander-in-Chief of naval forces during the brief
Anglo-French War in 1475. On the other hand, the Crown was somewhat grudging with grants of land, his estates being confined to Devon and
Cornwall. Nor did he have a powerful network of family alliances: two of his sisters married into the Carew and Arundell families who were of purely local importance; the others married into the Zouche and Fitzwarin families, who were peers but not, until the accession of Richard III, of wide influence.
Under Richard III After Richard III's accession, Dynham continued to flourish, becoming
Lieutenant of Calais. In that capacity, he recaptured
Hammes Castle, which had defected to Henry VII, but was criticised for allowing the garrison to depart. His marriage connections became temporarily useful.
John, 7th Lord Zouche became his brother-in-law after marrying Dynham's sister, Joan. Zouche was one of the up-and-coming men in Richard's reign, but his prospects were later ruined by the
Battle of Bosworth.
Under Henry VII After Richard's death, he remained at Calais until it became clear that Henry VII bore him no ill-will. In fact, Chrimes suggests that Henry was anxious to obtain the services of a man with such a record of service and loyalty to the Crown. While the Zouche connection had been useful, Dynham acquired a new patron in Lord Willoughby de Broke, his second wife's father, who was Steward of the Royal Household. Certainly, Dynham flourished under Henry; he was made a
Knight of the Garter, and was Lord Treasurer from 1486 until his death: he took his duties at the
Exchequer very seriously and spent most of his time at
Lambeth for convenience. He received several grants and sat on numerous commissions. He was one of the judges who tried the rebels after the
Cornish Rebellion of 1497. His career did not suffer from the execution for treason of his stepson Lord FitzWalter in 1495; nor the attainder of his brother-in-law Lord Zouche; he was given an allowance to support his impoverished sister Lady Zouche, and Zouche after years of disgrace was eventually restored to a measure of favour. He died at his home in
Lambeth,
Surrey, on 28 January 1501, and was buried in the
London Greyfriars. He had no surviving legitimate children, and his three brothers having all predeceased him, the title died with him. One of his brothers,
Oliver Dynham, died as
Archdeacon of Surrey in 1500. ==Marriage and children==