 He was largely responsible for the erection of Westminster Bridge.The title descended directly to Henry, 10th Earl (1734–1794), a soldier, who wrote ""The Method of Breaking Horses"" (1762); George Augustus, 11th Earl (1759–1827), an ambassador extraordinary to Vienna in 1807.Robert Henry, 12th Earl (1791–1862), died in France without issue and was buried in the Père Lachaise Cemetery in Paris.