John was a kinsman of the John Lawhire who sat for Lostwithiel in the first Parliament of 1377. In the same year his father, Gerard, made a formal division of his lands (mostly in the parish of Fowey) between him and his brother, Thomas; but the reasons behind the settlement are obscure, and in fact the father retained overall control of the estate until after 1408.
From 1424 Lawhire served for seven years on the Cornish bench and so established important contacts with the gentry of the shire. Already, in 1423, he had been made a trustee of the estates in Somerset, Devon and Cornwall belonging to the two daughters of Thomas Peverell, who were by then married to Sir William Talbot. and Sir Walter Hungerford; and it was on their behalf that in 1427 and 1431 (by which time Hungerford had been made a peer and treasurer of the Exchequer) he presented incumbents to Diptford church, Devon.
It was also in 1427 that Lawhire acquired a reversionary interest in lands in Resudgian and Trenalls (in the parish of St. Hilary), but at the assizes held in the following year he was accused with John Fursdon of evicting John Cork of Paderda of other properties in the shire, thus being drawn into Fursdon’s longstanding quarrel with the plaintiff. He is last recorded in 1432 when appointed as one of the quorum of a commission ordered to investigate the wastage of assets at Helston by Robert Treage (his fellow MP for Bodmin in 1420) and Richard Penpons; and he died before 1443 when his daughters, Elizabeth and Joan, came into their inheritance.
