 In 1854, he met at Hazelwood a distinguished Waterloo veteran, Colonel George Dawson-Damer (younger brother of the 2nd Earl of Portarlington), and his daughter, Constance.Leslie married Miss Damer two years later at St George's, Hanover Square, London.His new mother-in-law, Mrs Damer ("Minnie Seymour"), was the adopted daughter of George IV's wife, Maria, Mrs Fitzherbert.