With the "apron" stage arose a more natural form of play than had been produced upon the Elizabethan platform. The Drama of Rhetoric was soon supplanted by the Drama of Conversation. Oratory gradually disappeared, set speeches were abolished, and poetic lines gave place to rapid repartee. The comedy of conversation that began with Sir George Etherege in 1664 reached its culmination with Sheridan in a little more than a hundred years; and during this century the drama became more and more natural as the years progressed. Even in the days of Sheridan, however, the conventions of the theatre were still essentially unreal. An actor entered a room by walking through the walls; stage furniture was formally arranged; and each act terminated with the players grouped in a semicircle and bowing obeisance to applause. The lines in Sheridan's comedies were indiscriminately witty. Every character, regardless of his birth or education, had his clever things to say; and the servant bandied epigrams with the lord. It was not until the nineteenth century was well under way that a decided improvement was made in the physical conditions of the theatre. When Madame Vestris assumed the management of the Olympic Theatre in London in 1831 she inaugurated a new era in stage conventions. Her husband, Charles James Mathews, says in his autobiography, "There was introduced that reform in all theatrical matters which has since been adopted in every theatre in the kingdom. Drawing-rooms were fitted up like drawing-rooms and furnished with care and taste. Two chairs no longer indicated that two persons were to be seated, the two chairs being removed indicating that the two persons were _not_ to be seated." At the first performance of Boucicault's _London Assurance_, in 1841, a further innovation was marked by the introduction of the "box set," as it is called. Instead of representing an interior scene by a series of wings set one behind the other, the scene-shifters now built the side walls of a room solidly from front to rear; and the actors were made to enter, not by walking through the wings, but by opening real doors that turned upon their hinges. At the same time, instead of the formal stage furniture of former years, appointments were introduced that were carefully designed to suit the actual conditions of the room to be portrayed. From this time stage-settings advanced rapidly to greater and greater degrees of naturalness. Acting, however, was still largely conventional; for the "apron" stage survived, with its semicircle of footlights, and every important piece of stage business had to be done within their focus.