Grevet may have already been serving as common clerk for Winchelsea by the autumn of 1430, when he witnessed deeds in the town on behalf of Richard Lundeneys* and for the endowment of the chantry of St. Nicholas in the parish church by William Skele†.
Little is known about Grevet’s private concerns, or of his property, although he did own a quay in ‘Le Trecherie’ at Winchelsea, and as a Portsman he could claim exemption from parliamentary taxation on his moveable possessions outside the liberty, at Udimore, Pett and Icklesham.
