By the age of seventeen Humfrey's anthems were evidently in use and he was sent by the King to study in Paris, probably in January 1665 where he was greatly influenced by music at the French Court.
Aos seus dezasete anos, Humfrey xa era moi coñecido polos seus himnos, e o rei enviouno a estudar a París, probabelmente en xaneiro de 1665, onde colleu moitas influencias da música da corte francesa.