In the late 1830s the Government Architect, Mortimer Lewis, designed the Supreme Court House (still standing on Oxford Street in Darlinghurst). Its severely classical form was much admired: Louisa Anne Meridith thought it the only `architectural' building in Sydney, while James Maclehose considered it representative of the `cottages, villas, and even mansions, partaking of a grandeur of character which could not have been contemplated in the early history of the colony [but which] are now to be seen in almost every direction...' 
Reference: George Edwards Peacock exhibition catalogue. State Library of New South Wales, 2002