Soane seems to have taken the preceding scheme (drawings 62-67) and added to each of the four corners and either side of the entrance, a square, two storey 'turret'. The upper storey is plain and windowless while below, the turrets have horizontal rustication, are framed by Ionic columns and have a single window each. The loggia of the earlier scheme is now a porch with a turret, in the same style, on either side. Apart from two bay windows each for the drawing and dining rooms and two closets for the entrance hall, it is difficult to know what has been gained.
A departure from the previous plan (drawings 62-63) is that the passageway between the old and new buildings is much much narrower.