Canon’s grandfather migrated to Haverfordwest from Laugharne in Carmarthenshire.
Early in 1605 Canon was in London to further the countess of Northumberland’s suit for Perrot lands,
Canon was part of the antiquarian circle of Sir Robert Cotton*, from whom he borrowed manuscripts.
Canon was an early investor in the Virginia Company, and initiated an abortive project in 1619 for planting English settlers in the waste parts of Wales.
Replying to a bill preferred by Canon in Chancery in 1622, Lewis Powell* of Greenhill, on the southern side of Milford Haven, described the former as a ‘very troublesome, litigious and contentious person, much given to vex and trouble other men with suits of law’, and there is ample evidence of Canon’s taste for legal proceedings.
The following year Canon was elected to the first Caroline Parliament, apparently without opposition. His success may have been due to the temporary eclipse of Perrot’s power: no longer mayor of Haverfordwest, he also failed to secure a county seat. Canon left no mark on the records of the Parliament. In 1626 the Haverfordwest seat was contested by Canon and Perrot. On 13 Jan. Perrot joined with two other deputy lieutenants to complain to Secretary Conway that they were ‘interrupted in our services and vexed by one Sir Thomas Canon ... who hath commenced several suits against us and sundry others, but hath prosecuted few to any effect’.
In 1627 Canon was named a commissioner for exacted fees, and he became one of the commission’s most assiduous members.
Perrot was re-elected for Haverfordwest in 1628. Canon, however, was able to find an alternative seat at Haslemere, where the dominant electoral patron, Sir George More*, had previously nominated men connected with the earl of Northumberland. Canon again made no recorded speeches, but was nominated to five committees in the first session, one of which was the committee for privileges (20 March). According to one diarist, Canon himself was questioned before this body on 10 Apr. ‘for his election in a town in Cornwall’, but it seems likely that the diary’s author was confusing him with Thomas Cotton or Thomas Cary, both of whom had been returned for boroughs in Cornwall. As well as the privileges committee, Canon was appointed to consider bills to mitigate sentences of excommunication (14 Apr.) and to prevent judicial corruption (23 Apr.) and the begging of forfeitures before attainder (14 May). He was also added to the committee for preparing a list of the names of recusant officeholders for presentation to the king (12 May). The last appointment suggests that his crypto-Catholicism was either of a later date or not widely known.
Canon continued to undermine Perrot’s power in South Wales. His attack on the ‘frivolous jurisdiction’ of the Admiralty in South Wales in 1632 was almost certainly aimed at the latter, who was deputy vice admiral for Pembrokeshire, Carmarthenshire and Cardiganshire.
Despite the Proclamation of 20 June 1632 ‘commanding the gentry to keep their residence in the country’, Canon took up lodgings in the parish of St. Dunstan-in- the-West, and was brought into Star Chamber.
In his will of 20 Oct. 1638, Canon left £165 in various ways to Haverfordwest. He gave the Pembrokeshire rectory of Lambston ‘towards the pious work of the cathedral church of St. Paul’s’, but on condition that the bishop of London, lord treasurer Juxon, should procure the Pembrokeshire feodaryship for his nephew and heir Maurice, son of his ‘simple’ brother. Other legacies to the church, including the augmentation of the income of one rectory by a grant of tithes, had no such strings attached. His brother, John Canon, was to receive a life annuity of £50, which was then to pass to his heirs forever, and all his relatives were similarly provided for in their degree. His seven executors included the archdeacon of St. David’s and Hugh Owen*, as well as Maurice Canon, but when he died in the following year, seised (it was said) of a real estate of the value of £1,000 p.a. and possessed of a personal estate of £20,000, the nephew managed to block payment of the legacies. By his own will, made in December 1639, the younger man even pretended to have the disposition of his uncle’s estate by a will dated 20 May 1628. He then took the precaution of leaving £100 to his ‘much honoured friend’ Sir Henry Marten*, judge of the Prerogative Court of Canterbury, and of naming one of Marten’s household an executor; but when he himself died during the Commonwealth some at least of Canon’s legacies were paid. No later member of the family entered Parliament.
