Robertson designed the expansion in the Colonial Revival style , to be compatible with the neoclassical Federal style of the original but more ornate .
Webb also renovated and expanded the mansion , hiring R.H. Robertson to double the size of the house .
R.H. Robertson designed the expansion in the Colonial Revival style , to be compatible with the neoclassical Federal style of the original but more ornate .
Webb also renovated and expanded the mansion , hiring R.H. Robertson to double the size of the house .