"The outside of the Building, which surrounds the Theatre, is faced with Portland stone, and will be finished with a ballustrade. The Theatre which rises above is intended to be faced with stone, or a cement equal to it, and is also finished with a balustrade. Through the Roof rises a Turret, including a large Ventilator and a Staircase leading on to the Roof. The Turret takes something of the form of the Octagon Tower of Andronicus Cyrrhestes [i.e., Tower of the Winds] at Athens, and is nearly as large, and on the summit is placed a figure of Apollo, about 10 feet high. From the Terrace on the Roof is by far the finest bird's eye view of London and the River Thames that can be seen from any other place".
Rupert Gunnis suggests Ann eymour Dameras the sculptor.