Crathorne, who originated from Marton in Sinnington in the North Riding, already had established commercial links with the merchant community of York when in 1421-2 he purchased the freedom of the city.
Before long, Crathorne was admitted to the prestigious Mercers’ Company of York. The date of his entry is not recorded, but by March 1436 he was sufficiently well regarded among its members to be elected as one of their constables, a post which he retained for a lengthy term of some six years until 1442. City office soon followed. On 2 Feb. 1440 he was chosen as one of the city’s three chamberlains, and on completion of his term he was pricked one of the city’s sheriffs, in this capacity presiding over the election to Parliament of William Girlington* and Thomas Ridley*. Indeed, Crathorne’s shrieval year proved a busy one. He was named to three royal commissions and it may have been his burgeoning responsibilities in civic government that led to the end of his tenure as one of the constables of the Mercers’ Company in March 1442. Crathorne’s subsequent advancement was rapid. He probably joined the ranks of the council of 24 as soon as he was discharged of his shrievalty, and in March 1443 he was named a commissioner of sewers in York, an unusual responsibility for a junior councillor.
In the interim, Crathorne and his wife had been admitted to the prestigious guild of Corpus Christi, and by November 1443 he had probably joined the ranks of the city’s aldermen, since he was among a small group of senior councillors who witnessed a series of deeds concerning property belonging to the York merchant William Kyllom.
Not surprisingly, Crathorne’s friends and associates were chiefly drawn from among his fellow merchants involved in the Hanseatic trade. In 1445 he acted as a feoffee for the Yorkshire gentleman Roger Crome, alongside William Clyff (d.1453), one such merchant, and the lawyer Guy Fairfax.
Little is known of Crathorne’s final years. Just weeks after his return from Parliament he was chosen as master of the Mercers’ Company, a position he held for one year, and he was present in the civic council chamber in January and October 1449 to witness the parliamentary elections.
