ヘンリー・ペティ＝フィッツモーリス
Lord Newton was also the author of two biographies, one on Richard Lyons, 1st Viscount Lyons, published in 1913, and the other on Henry Petty-Fitzmaurice, 5th Marquess of Lansdowne, published in 1929. In 1941 he published his memoirs, entitled "Retrospection".