Brett’s ancestors were holding the Somerset manor of Whitestaunton by 1433 and two members of the family represented the county in the 1337 Parliament.
That same year he paid £100 to Thomas Symcock, a member of the queen’s guard, to appoint him deputy keeper of Agardsley Park in Needwood Forest, Staffordshire, which formed part of the duchy of Lancaster. He thereupon displaced the former deputy keeper, Edward Harcourt, and installed in his stead his own kinsman by marriage, William Agard. An angry Harcourt appealed to the queen, who, furious that Harcourt, ‘a poor gentleman that had done her service’, had been so unceremoniously removed and that Brett, ‘being her servant’, had acted in such an underhand manner, instructed her vice chamberlain, Sir John Stanhope*, to ensure that Harcourt’s interests were safeguarded. Brett was subsequently forced to promise that he would not relinquish control of the park to Agard without Harcourt’s consent, but after Harcourt refused to give his permission he installed his kinsman anyway. Soon afterwards, Brett, taking a liking to the park and realizing that the keepership might provide him with an opportunity to establish himself in Staffordshire society, demanded that Agard turn control of the property over to him. When Agard refused to do so Brett, in 1603, initiated legal proceedings which remained unresolved as late as October 1604.
Brett was knighted early in the new reign, and a few months later achieved a fortunate second marriage with the sister of Cobham’s follower, Sir Francis Fane*. In March 1604 he contemplated becoming steward of the household to his mother-in-law, Lady Mary Fane, who shortly thereafter became Baroness Le Despenser, but she decided to move in with him and his wife instead, ‘and so that opportunity was lost’.
A staunch Calvinist, who considered himself a member of the elect, Brett won the favour of the young Prince Henry who, in December 1607, stood as godfather to his short-lived son, Henry.
By July 1610 Brett had become a member of the Kent county bench. This suggests that he was now spending more time at West Malling than at Westminster, and not surprisingly, therefore, he proved willing to sell to Northampton much of his Westminster property. That month he sold the earl a private chapel in Charing Cross, which lay near the gardens of Northampton House.
Brett drew up his will ‘after a long sickness’ on 23 Aug. 1620. He provided for the maintenance of ‘the now used lecture’ at West Malling, with 10s. a week to be paid to the preacher, and left an annuity for 20 poor of the parish of West Malling. In a codicil dated 24 Aug. he further devoted £10 p.a. to augment the living of East Malling. Sir Humphrey Lynde*, the husband of one of his nieces, was one of his executors. The overseers were ‘his worthy and loving friends’ Sir John Vaughan*, Sir Thomas Denton*, and William Noye*.
