The Manston family had held the manor of the same name on the Isle of Thanet, near Ramsgate, since at least the reign of King John.
Manston’s activities in the early years of Henry VI’s reign are poorly documented, but it is likely that they were spent consolidating his position as a landowner on the Isle of Thanet. Little is known about Juliana Hils, Manston’s first wife,
In 1434 Manston was among those in Kent instructed to take the oath not to maintain law-breakers.
On his return home, Manston continued to play his part in the public affairs of Kent. In 1438 his local knowledge was called upon when he was commissioned to inquire into wastes at the rectory of Newington by Hythe, and three years later he was one of those nominated to treat for an advance of the subsidy granted in the Parliament of 1439-40. In March 1443 he was named on the first of several commissions of array, suggesting that this was a task in which he excelled. Although in July 1450, during Cade’s rebellion, he was named twice in separate royal pardons (both as resident in the hundred of Ringslow), this does not necessarily mean that men from the Isle of Thanet formed part of Cade’s host. There is no evidence that Manston personally joined the rebels at Blackheath, and the purchase of pardons was probably mere prudence on his part. His appointments in the following spring to commissions to deliver the gaol at Canterbury and array the men of the Isle of Thanet to resist the French, rumoured to be preparing to attack the coast of Kent, demonstrate both that the Crown had no reason to doubt his loyalty and that he remained one of the leading military men of the county.
Manston’s private concerns were centred upon the Isle of Thanet. He was frequently called upon to act as a feoffee for his neighbours there and elsewhere in east Kent, in these duties coming into regular association with other landowners and local lawyers.
One of the factors which drew the leading men of Thanet together was their tenancy of land pertaining to St. Augustine’s abbey in Canterbury. In 1441 anger over the rents charged by the abbot on the manors of Minster and Heagrave had reached a crisis and the abbot was forced to negotiate new leases with the leading tenants.
Manston last Crown appointment was the commission of array to which he was assigned in January 1458. His omission from various similar commissions sent into Kent during the turmoil of 1458-61 may suggest that he died soon afterwards. He was buried, next to his brother Roger, in the Greyfiars, Canterbury. His son Nicholas, his putative heir by his first marriage, had died in 1444, leaving as his sole heir his daughter, Joan. She married Thomas St. Nicholas, a kinsman of the Thanet family for whom Manston acted as feoffee in the 1440s. The recognizance for 1,000 marks which Thomas made to the MP in 1447 may have been related to the settlement of the St. Nicholas estate or to his marriage.
