 The client was George Maule, 2nd Earl of Panmure (1619–1671).On Mylne's death, the work was continued by Alexander Nisbet, an Edinburgh mason, and the interior was fitted out by James Bain, the king's wright.Sir William Bruce was sometimes credited with the design in the past, and he did apparently advise the Earl after Mylne's death, but he only designed the gates and gate piers.