Of obscure background, Poy was living and trading in Salisbury by the early 1420s. The occupation of ‘chapman’, which was accorded him on occasion, falls far short of an adequate indication of the breadth of his commercial concerns, for he dealt extensively in wine and large quantities of oil (imported through Southampton and brought on carts to sell in Salisbury’s markets). Even more important was his trade in woad and madder, commodities essential for the local cloth industry in which he took a close interest. A better description might be ‘mercer’.
Poy’s involvement in the cloth trade led to his appointment by the Crown as alnager in Wiltshire and the city of Salisbury in March 1437 (with effect from the previous Michaelmas), and on the expiry of his seven-year-term he was reappointed along with William Ludlow (the clerk of the staple at Salisbury). As they were not replaced in office until the summer of 1451,
Poy’s personal contributions towards Salisbury’s composite loans to the Crown while initially quite modest, gradually increased in size as he grew in prosperity and standing, rising from just 3s. 4d. in 1441-2 to £1 in 1448-9 and 1454.
As a member of the convocation, Poy participated in Salisbury’s elections to the Parliaments of 1432, 1449 (Feb.) and 1449 (Nov.). Furthermore, he attested the county elections held at Wilton for the Parliament of 1437, and attended the shire court again in the autumn of 1449 to stand surety for one of Salisbury’s representatives, the lawyer Edmund Penston*.
Poy was not elected as an MP until 1455, after nearly 30 years’ service in the city’s affairs. He was present in convocation for his election on 20 June. The Parliament met at Westminster on 9 July. Shortly before the start of the second parliamentary session in November he was named as an arbiter at home, to settle disputes between the mayor, William Swayn*, and two fellow members of the council of 24: Edmund Penston and Richard Hayne II*.
Poy belonged to the civic fraternity of St. George, of which he had been one of the stewards in 1438, and was on amicable terms with a number of citizens whom he regularly assisted in their transactions.
In the tax assessments made in February 1451 Poy was said to be in possession of land in Wiltshire worth £8 p.a., and he also owned several properties in Salisbury. Together with his first wife he occupied a house in Endless Street, which had been settled on them and their issue, but by 1455 he given up his tenancy of this and certain other holdings, notably his corner tenement on New Street and Love Lane which had come into the possession of William Swayn, and a cottage in Drakehall Street which he had sold. Yet he retained a large house with a gate in Gigor Street, two more in Winchester Street, and other buildings opposite the market.
Poy last attended a convocation at Salisbury on 28 Oct. 1463,
