Descended from a London Vintner, the Cornwallis family of Suffolk had resided at Brome Hall since the early fifteenth century. Both Cornwallis and his brother William were raised as Protestants, though their father was a loyal servant of Mary Tudor.
Cornwallis was elected knight of the shire for Norfolk in 1604 alongside Nathaniel Bacon. After some dispute over who should occupy the first seat, Cornwallis agreed to accept the junior position.
Cornwallis did not attend the second session of 1605-6, because early in 1605 he was appointed resident ambassador to Spain, a position which had been vacant for 37 years. He undoubtedly owed his sudden advancement to the influence of Robert Cecil†, earl of Salisbury, and to the intervention of his brother, Cecil’s kinsman by marriage.
Cornwallis’ time as ambassador was mainly spent dealing with English merchants who complained that their Protestantism was being used as an excuse by avaricious inquisitors and other government officials to seize their goods. As confiscation of goods on religious grounds was forbidden by the treaty, Cornwallis was often involved in delicate negotiations.
The following year, Cornwallis resumed his seat in Parliament, as an earlier attempt to replace him because of his diplomatic duties had failed.
On his return from Spain Cornwallis, doubtless with Salisbury’s assistance, was appointed treasurer of Prince Henry’s Household. In general he found Henry to be an impressive figure, but in his ‘Life of Prince Henry’ he noted that the prince often played tennis three or four hours at a time without changing his shirt, a habit which he found ‘rather becoming an artisan than a prince’. He also accused Henry of eating too much fruit; of being impatient with his younger siblings, Charles and Elizabeth; and of speaking in a manner that was ‘slow and somewhat impedimented’, though he admitted that Henry ‘often [said] of himself [that] he had [the] most unserviceable tongue of any man living’.
Cornwallis sought election to the 1614 Parliament on the Bacon interest at the Suffolk borough of Eye, but in his own words ‘failed in my hope by reason the election had passed one day before my going out of London’.
Cornwallis’ pleas to be released and his own account of his conduct in the matter reveal inconsistencies which may indicate his guilt. Writing to Secretary Ralph Winwood*, Cornwallis argued that he had merely suggested a way in which future parliaments could be managed. He claimed that he had proposed that, whenever Parliament was summoned, the king should
acquaint the justices of peace [and] principal gent[lemen] of every county ... w[i]th His Ma[jes]ty’s desires for himself [and] purposes of grace to them. To take knowledge fro[m] them what themselves would beseech of him, [and] insist ... the differences [and] difficulties ... might be imparted to His Ma[jes]ty and by his directions evened [and] compounded before [the] choice of their k[nigh]ts [and] burgesses.
The advantage of this manner of proceeding would be to produce Members who were willing to co-operate with the royal will. As matters stood, individual parliament-men ‘in their counties are of themselves like a smooth brook’, but recent evidence suggested that ‘when they meet in [the] broad sea of [the] Parliament’ they ‘are easily tossed [and] turned w[i]th every wind’.
Cornwallis attempted to gain his release by writing to both Winwood and the countess of Suffolk, asking them to enlist the support of the king’s Scottish favourite, Robert Carr, earl of Somerset.
Shortly before he died, Cornwallis penned a letter of advice to his eldest son, William. It reveals a degree of bitterness about the treatment he had received: ‘my service in Court ... I cannot by any means recommend unto thee - chance, fancy and money, [the] false factors of preferment have had so great a [torn] of thy means, fortune and fashion.’ He argued that
continually [to] accumulate riches, offices and honours, breeds burden and perils innumerable, and in time a disease incurable. But if contrary to my counsel, thy ... shall be disposed to sail in the troubled seas of the Court [and] world w[i]th any assurance or contentment, thy arms and provisions must be [that] of a good conscience and of a mind prepared for all events, which he only enjoyeth [that] perfectly feareth God and levelleth all his intentions and [torn] to [the] service of him and his church.
Cornwallis also counselled his son to observe the Sabbath, and to avoid the sins of the flesh, lying, drinking and playing ‘boys’ games’ such as dice, cards and tops.
Cornwallis remained active in Norfolk administration in the late 1620s, but also spent time at his Staffordshire property, Harborne, where he died in December 1629. He died intestate and, his eldest son Sir William* having predeceased him, his principal heir was his grandson and namesake.
