Vous. Cp. page 13, note

4. Dame, originally the Latin dominus or domina, and thus an invocation of our Lord or of the Virgin Mary. Cp. English, " Lord ! " " Lud ! " and the earlier " By our Lady ! " It is now used chiefly, though by no means exclusively, by country Catholics, and so as here by servants. It usually expresses surprise or négation, but must be rendered always with regard to the context.