As noted in the earlier biography,
Rather than Sir John of Lanherne, it was his kinsman, Sir John Arundell II* of Trerice, who served in the earl of Devon’s retinue in France in mid 1420. Arundell himself may, however, also have sailed to France, possibly in the King’s own retinue, for he had secured letters of protection for this expedition that April.
It is not clear what caused Arundell’s serious quarrel with his kinsman and namesake Sir John II, but it may have been in some way connected with his acquisition in 1415 of estates previously held by Joan, widow of Sir John II’s grandfather, Sir Ralph Arundell. In October 1417 Sir John II was bound to his kinsman in £300, but by 1421, when the matter reached the King’s council, the quarrel had flared up again.
No concrete evidence of the exercise of any electoral patronage by Arundell has been discovered, but it is indicative of his central position in Cornish society that many of the lesser gentry who represented the county’s boroughs in the Commons were in some way connected with him, some more closely than others. Thus, John Polrudden* served him as his attorney in the Westminster law courts in the 1420s, while John Trewint* was his receiver.
The limits to even Arundell’s powers are illustrated by his abortive attempt to arrest the notorious Richard Tregoose* in July 1427. Although formally taken into custody by Sir John, Tregoose broke free and joined his waiting retainers, against whom the j.p. proved to be powerless.
