 Complete the following phrase:  Vernon was advanced 45 10s. by the Exchequer in June 1416 to cover service in France, in which he was engaged for a few months. 40 a year was considered sufficient to support a knight, while 9 would pay an archer., so it is possible Vernon campaigned with a small force. If so, the most likely destination was Harfleur, where the English garrison was left stranded after the 