Tennyson: Aspects of his Life Character and Poetry, (Constable, 1923).
Byron: the Last Journey, April 1823-April 1824, (Constable, 1924).
Swinburne, (Macmillan, 1926).
The Development of English Biography, (Hogarth Press, 1927).
Sweet Waters: A Novel, (Constable, 1928).
Sir Arthur Nicolson, Bart.; First Lord Carnock: A Study in the Old Diplomacy, (Constable, 1929).
Swinburne and Baudelaire, (Clarendon, 1930).
Portrait of a Diplomatist: Being the Life of Sir Arthur Nicolson, First Lord Carnock, and a Study of the Origins of the Great War, (Houghton Mifflin, 1930).
People and Things: Wireless Talks, (Constable, 1931).
Peacemaking 1919, (Constable, 1933).
Curzon: the Last Phase, 1919-1925, (Constable, 1934).
Some People, (Oxford University Press, 1934).
Dwight Morrow, (Arno Press, 1935).
The Meaning of Prestige, (The University Press, 1937).