In 1913, he married the writer Vita Sackville-West, who encouraged his literary ambitions. In 1921, he published a biography of French poet Paul Verlaine, to be followed by studies of other literary figures such as Tennyson, Byron, Swinburne and Sainte-Beuve. In 1933, he wrote an account of the Paris conference entitled Peacemaking, 1919. In the 1930s, he and his wife acquired and moved to Sissinghurst Castle, where they created the gardens that are now famous and run by the National Trust.