The heir's style is The Master of or The Mistress of . If the master is an heir-apparent, and the peerage has subsidiary titles that could be used as a courtesy title, then the styling of Master is usually forgone. However, if the person is an heir-presumptive, or if the peerage has no subsidiary titles, Master/Mistress is a common styling. However, because the word Mistress is quite archaic, many women choose not to use the style Mistress and instead use the regular styling, e.g. Lady Mary Smith or The Honourable Mary Smith.