The Blyton family had played an important role in the administration of Lincoln since about 1300, and the profits of trade had enabled them to extend their landholdings from the city into the country. By the late fourteenth century the senior branch was established at Leadenham, while a junior branch remained in the city.
Blyton began his recorded career by attesting the Lincolnshire election of 25 Dec. 1430, when Hamon Sutton I*, the leading merchant of the city and one of the feoffees of William Blyton, was returned. His first recorded involvement in the affairs of Lincoln is his attestation of the election of 7 Apr. 1432. When Sutton was returned to represent the county on 12 Sept. 1435, he was once more named among the county electors.
References to Blyton after this date are scarce. In May 1438 he acted as a mainpernor in Chancery for Sutton when the latter was granted the marriage of a Lincolnshire heiress. Interestingly, his fellow surety was one William Blyton of London, which suggests that the family had established a branch in the capital. In Hilary term 1442 John was defending an action sued by William Gressington* for a debt of four marks. On this occasion he was described as citizen and armourer of Lincoln. This is the only reference to his trade, but it is interesting to note that two Blytons, Laurence and Thomas, were armourers in London during the 1420s. He was dead by Easter term 1443.
