In the summer of 1818 Leigh applied to government for permission to retire with a pension from his excise collectorship. He was ‘past sixty years of age’, had complied with the requirements of the Superannuation Act, and was anxious, above all, to take his ailing wife ‘to a climate more suited to her constitution’.
Leigh, who lost his eldest son in 1827, died in 1839, when he was succeeded by his grandson, Francis Augustus Leigh (1822-1900).
