Soane's rough sketches show variant designs for the entrance hall. The vestibule has apsidal ends and a shallow pendentive ceiling raised on four segmental arches springing from Greek Doric columns. The soffits of the arches have incised mouldings with an attenuated Greek fret motif. The walls of the vestibule are faced with a banded rustication; in drawing 103, a frieze ornamented with coats of arms has been added in pencil (as in drawing 97). At one end of the room, a quarter-stair ascends to the principal corridor and tribune. The stair is framed by a segmental arched opening between two oculi over closet doors.