More may be added to the earlier biography.
In early 1415 Hervy took the bailiwick of the stannary of Blackmore to farm from the duchy bailiff, William Alcock, for a term of four years at an annual rent of 11 marks. In the first instance, this arrangement worked to the parties’ mutual advantage, but in February 1418 the farm was in arrears by £3 13s. 4d., and that autumn Alcock resumed his office and began legal proceedings against Hervy and his sureties.
The extent of Hervy’s property is uncertain, but it is known that he held at least one tenement in Lostwithiel from the town’s one-time mayor, Robert Grythyowe, and Thomas Lamleder.
Some of Hervy’s activities are difficult to distinguish from those of a contemporary Liskeard tanner, but it was probably the latter man, rather than the Lostwithiel MP, who at some point in the second half of Henry V’s reign was accused by John Jaybien† of having assisted Sir Ralph Botreaux* in depriving him of his lands in Liskeard and elsewhere.