The Book of Household Management by Mrs. Beeton

39. AFTER-DINNER INVITATIONS MAY BE GIVEN; by which we wish to be

understood, invitations for the evening. The time of the arrival of these visitors will vary according to their engagements, or sometimes will be varied in obedience to the caprices of fashion. Guests invited for the evening are, however, generally considered at liberty to arrive whenever it will best suit themselves,--usually between nine and twelve, unless earlier hours are specifically named. By this arrangement, many fashionable people and others, who have numerous engagements to fulfil, often contrive to make their appearance at two or three parties in the course of one evening.