The Book of Household Management by Mrs. Beeton

and well swept, brushed, and dusted her kitchen, the breakfast-bell will most likely summon her to the parlour, to "bring in" the breakfast. It is the cook's department, generally, in the smaller establishments, to wait at breakfast, as the housemaid, by this time, has gone up-stairs into the bedrooms, and has there applied herself to her various duties. The cook usually answers the bells and single knocks at the door in the early part of the morning, as the tradesmen, with whom it is her more special business to speak, call at these hours.