Leigh rebuilt the derelict shell in the style and manner of Smirke, rather than to Adam's earlier plan. In about 1863 "there was found a hoard of Roman coins near Luton, on the estate of John Shaw Leigh, Esq., of Luton Hoo. The coins, which must have been nearly a thousand in number, had been deposited in an imperfectly burnt urn composed of clay and pounded shell and consisted of denarii and small brass, ranging from the time of Caracalla to that of Claudius Gothicus". In 1871 the estate was inherited by his son John Gerard Leigh (1821–1875), who in 1872 married Eleanor Louisa Hawkes (d.1899), a daughter of Thomas Hawkes and widow of Hon. Humble Dudley Ward (1821–1870), a son of William Humble Ward, 10th Baron Ward of Birmingham. She was a close friend of the Prince of Wales. John Gerard Leigh died in 1875, only three years after his marriage, childless. He left his money to his wife Eleanor, together with a life-interest in Luton Hoo,