He was a
Member of Parliament for
Tavistock in Devon, from 1467 to 1468. He was a
Lancastrian and had his lands confiscated in 1471 by the
Yorkist King
Edward IV, although these were returned to him the next year. Angered by
Richard of Gloucester’s usurpation of the throne in 1483 and the rumours of the murder of
Edward V and his brother in the
Tower of London, Edgcumbe joined the rebellion led by
Henry Stafford, 2nd Duke of Buckingham to dethrone the Yorkist
Richard III and replace him with the Lancastrian
Henry Tudor. When the rebellion collapsed and Henry's ships fled, Edgcumbe's arrest was ordered and a troop of soldiers commanded by the notoriously brutal Sir Henry Trenowth of Bodrugan were sent to arrest him. He hid on the wooded hillside of his
Tamar-side home,
Cotehele, and when his hiding place was discovered, threw his pursuers off the scent by filling his cap with stones and throwing it into the river, fooling his pursuers into thinking he had drowned and thus escaping certain death. After his escape, he fled to
Brittany and joined Henry Tudor with whom he returned to England in 1485. He was knighted later that year after the
Battle of Bosworth, where Henry Tudor and the Lancastrians were victorious. He held important offices in the new reign: an MP for Tavistock once again in 1485,
Privy Councillor,
Comptroller of the Royal Household,
Sheriff of Devon in 1487 and Ambassador to
Scotland.
In Ireland He carried out a number of important assignments for the new King. In 1488, following the crushing of the
Lambert Simnel rebellion at the
Battle of Stoke Field, he was tasked with administering the oaths of allegiance in
Ireland to the
Anglo-Irish nobles who had supported Simnel's claim to the throne, assisted by
John Payne,
Bishop of Meath, a former rebel who had been among the first to submit. He showed his shrewd political judgment in accepting the assurances of loyalty given by
Gerald FitzGerald, 8th Earl of Kildare, the most powerful of the Anglo-Irish magnates, whose influence made him an indispensable ally of the Crown; at the same time he showed his independence by refusing, against Kildare's urging, to pardon some of the more notorious rebels, notably Sir
James Keating, the Prior of
Kilmainham. He took care to be approachable: having administered the oath of fealty to Thomas Cusack, the
Recorder of Dublin, he dined with him "with great cheer". ==Death and burial==