On succeeding to his father’s estates in 1616, Bayntun became one of the wealthiest members of Wiltshire’s landed gentry.
The Bayntuns’ landholdings generally ensured that each generation could represent the county in Parliament, but failing the availability of this honour they were guaranteed a seat at one of several nearby boroughs. Bayntun began his parliamentary career in 1614 when, despite being technically under-age, he entered the Commons for Devizes. His sole committee appointment in this Parliament was to confirm letters patent made to his cousin Sir John Danvers* for property in Gloucestershire (31 May).
Outside Parliament, Bayntun’s private life was a catalogue of litigation, self-interest and dissoluteness. His claims to the right of common in the royal Wiltshire forests of Pewsham and Blackmore led to him being summoned in 1613 before the Exchequer Court for trespass.
Bayntun quarrelled frequently with members of his family, the local gentry and his own estate workers. In 1628 he was involved in a drawn out dispute over the settlement of Bremhill manor, worth £700 p.a., together with other properties in which his mother, Lucy, had been granted a life interest by his father. After her death in 1621 Bayntun claimed that Lucy, being ‘sickly, feeble and weak’, had been induced to move in with her nephew Sir John Danvers, who had subsequently tricked out of her personal estate worth £6,000. In his defence, Sir John and his uncle Charles Danvers* claimed that Lucy had transferred her estate to them while still living in Bremhill because Bayntun had treated her cruelly in her widowhood and had stripped the manor house of all its furnishings.
Bayntun displayed a marked lack of respect for authority. In 1627 he agreed to pay the Forced Loan only if he could deduct from his assessment £100, which he claimed the Crown owed him. In 1631 the sheriff of Wiltshire ordered him to muster at Warminster with 100 pike and muskets to help evict farmers from Selwood Forest, an engagement that erupted into a week-long riot which was suppressed only after cannon was brought up from Bristol. Although a deputy lieutenant, Bayntun refused, claiming that ‘he did not much fancy that work’.
As sheriff of Wiltshire in 1637-8 Bayntun behaved with his customary heavy-handedness. When Sir Edward Hungerford* challenged his Ship Money assessment, Bayntun took four of his horses. Hungerford forcibly recovered them and had Bayntun’s bailiff sent to Sir Francis Seymour* to explain his actions.
On the outbreak of war Bayntun became commander of the parliamentary forces in Wiltshire.
After the loss of Bromham House Bayntun’s place of residence is uncertain, for his other main house, at Bremhill, had also been destroyed by royalist forces.
