Originating from Wimpole in Cambridgeshire, Bonfay was a merchant who had business dealings in Colchester some years before he became one of its burgesses. He was a defendant in the borough court as early as November 1411, and again in 1419. On the second occasion the plaintiff, Stephen Flyspe, claimed that he had entrusted woollen cloth and other merchandise to Bonfay, formerly his bailiff and receiver, to sell on his behalf, but that Walter had subsequently failed to account for what he had done with these goods. In reply, Walter argued that he had not been Flyspe’s servant, and won the case.
Bonfay began his career as an office-holder in September 1425, when elected to the positions of coroner and member of the borough’s council. In the following decade, he served several terms in the offices of alderman and bailiff, and it was during his second period as an alderman that he was elected to his only Parliament. In December 1439, at a time of nationwide dearth, he was one of several merchants from Colchester whom the Crown licensed to purchase grain in Norfolk and Suffolk and to ship it, free of customs and subsidies, to their own town.
Bonfay made his will (no longer extant) in 1440-1 and is likely to have died soon afterwards (he was certainly dead by the autumn of 1447).
