Robert Mayhew’s origins are obscure, although it is likely that he was the son of a local man.
The first mention of Robert in the records of Sandwich came in December 1437 when he was chosen as one of the treasurers. There is evidence, however, that his first experience of government in the Port was marred by controversy. On the following 17 Feb. two local men asked for him to be examined by the jurats regarding payment for certain woolfells he had bought from a Brabantine merchant two years earlier.
Little is known of Mayhew’s private affairs or of his occupation, although he was described as a dyer in 1452. In the previous year two men from Sandwich had entered into recognizances of £20 each to him and Simon Ruddock concerning the wardship of a local boy, John Goffe.
