The son and namesake of a self-made Welshman and servant of the Lancastrian Crown who settled in Essex, Lewis had reached his majority when he succeeded his father in October 1442. Without a wife when the elder Lewis made his will on 2 June 1440,
Sir Lewis John had held lands in several counties but those in Essex made up the bulk of his estates, valued at £350 p.a. (a substantial sum but probably an underestimate) in 1436.
It was only after Anne, by then the dowager duchess of Exeter, died in November 1457,
A week after his father’s death, Lewis obtained a grant for life of the stewardship of the royal lordship of Havering, an office which Sir Lewis John had held before him.
In spite of the trust Edward IV had shown in him, but no doubt swayed by family sympathies for the Lancastrian cause, Lewis committed himself to Henry VI at the Readeption. Following the restoration of that King, Sir Henry Lewis was appointed sheriff of Essex and Hertfordshire and his elder brother as an ad hoc commissioner in Essex. The MP died fighting for the Lancastrians at Barnet on 14 Apr. 1471, perhaps as a member of the retinue which his cousin, John de Vere, 13th earl of Oxford, had brought to the field.
Lewis’s will – if he made one – no longer exists and there is no extant inquisition post mortem for his lands. These were confiscated by the Crown, even though it appears that (unlike the earl of Oxford and other supporters of the Readeption) he was never formally attainted. In the following December, the King granted them to the duke of Gloucester, to whom Richard Fitzlewis, Lewis’s son and heir, was obliged to make a formal conveyance of the manors of West Horndon, Field House (in West Horndon) and Ingrave and other lands in early 1474. This transaction was reinforced by an Act of Parliament, and Richard and his uncles, Sir Henry, Philip and John Fitzlewis, quitclaimed the properties to the duke on 7 Mar. 1475. Soon afterwards, Gloucester sold them to the queen, Elizabeth Wydeville, conveying them to her and her feoffees on the following 16 Mar.
