The origins of the Archdeacon family are obscure. In January 1418 an Edmund Archdeacon exported 23 tuns and one pipe of wine from Sandwich, but is unclear whether this was our MP or an older namesake.
On 6 Dec. 1445 Archdeacon was elected to the ranks of the jurats. His service would appear to have been continuous until his death and it is evident that he played an important role in the affairs of the town throughout the late 1440s. On 13 Oct. 1446 he was chosen to represent Sandwich at a meeting of the Brodhull and he was among the six jurats sent to attend the first court of Shepway held by James Fiennes*, Lord Saye and Sele, when he was appointed warden of the Cinque Ports in 1447. In July 1449 he was one of the Portsmen who travelled to Dover to consult with the lieutenant, Gervase Clifton*, over the election of the Ports’ bailiffs to the annual Yarmouth herring fair, and he attended another meeting of the court of Shepway in that year.
