Cornwallis has frequently been confused with his uncle, who sat for Lostwithiel in 1597 and died in 1611. However, the Member elected in 1604 is identified as Sir William Cornwallis ‘junior’ in the corporation records.
In the new reign Cornwallis, no doubt capitalizing on the contacts he had made in Scotland, secured a place in the privy chamber and, in 1604, published The Miraculous and Happie Union of England and Scotland in praise of James’ project to unite the kingdoms.
Cornwallis received six committee appointments in the 1604 session. The first, on 22 Apr., was to ban the making and selling of false dice, although, according to his father, he was not a gambler. Three days later the text of the bill and the committee list were delivered to him, suggesting that Cornwallis was in the chair, but the measure was reported by Richard Martin on 10 May, when it was dashed.
In 1605 Cornwallis acted as courier for his father during the opening months of Sir Charles’s embassy in Spain, but at the end of the year he wrote to the 1st earl of Salisbury (Robert Cecil†) that he was forced to leave the king’s personal service for want of means. ‘My engaged estate will enforce me to attend the protection of the Parliament.’
Cornwallis had probably returned to England by November 1608, when he was granted the benefit of his mother-in-law’s recusancy and protection against his creditors; but he was soon reduced to begging Hobart for a loan of £30 for the sake of his family. ‘If we have not some supply I protest before God we fall into the miserablest extremity’.
Granted £2,000 by James as a free gift in 1612.
