[3] He fought in the First World War, gaining the rank of Lieutenant in the service of the Welsh Guards, and in 1930 was appointed an honorary Colonel.

[5] Morgan provided inspiration for the character "Ivor Lombard" in Aldous Huxley's 1921 Crome Yellow, and for Eddie Monteith in Ronald Firbank's The Flower Beneath the Foot.

[9] During a lunch with Marie Belloc Lowndes in 1946, Morgan asserted that he was 'toying with the idea of proposing to Lady Illingworth' in an attempt to bring an influx of money to the failing estates.

[10] He died suddenly on 27 April 1949 at age 55, without issue, and his viscountcy became extinct, although the title of Baron Tredegar passed to his 75-year-old Uncle Frederic.

To avoid death duties Tredegar House passed straight to Frederic's son John, the 6th Baron, who soon afterwards sold it to the Sisters of St Joseph.