Portrait of an officer, thought to be Major William Caulfield (c. 1698-1767), half-length, in a breastplate and a red coat, a park landscape beyond

Major William Caulfield was the son of the Hon. Toby Caulfield, and grandson of William Caulfield, 1st Viscount Charlemont. He was made Inspector of Roads for Scotland in 1732, and after the departure of General Wade he became responsible for directing the construction of new roads and bridges. Although he is not as well known as Wade, he is associated with the construction of far more roads than his predecessor. General Wade was responsible for 250 miles (400 km.) of road, 40 bridges and 2 forts - whereas Caulfield was responsible for 900 miles (1,400 km.) of road and over 600 bridges.