William Morton Fullerton (18 September 1865 – 26 August 1952) was an American print journalist, author and foreign correspondent for The Times. Today he is best known for having a mid-life affair with Pulitzer prize-winning author Edith Wharton.
Fullerton was a graduate of Phillips Academy in Andover, Massachusetts and studied at Harvard. He received his Bachelor of Arts in 1886. While studying at Harvard, he and classmates began The Harvard Monthly.
After his graduation and first trip to Europe in 1888, he spent several years working as a journalist in the Boston Area. In 1890, four years after his graduation from Harvard, Fullerton moved to France to begin work for The Times office in Paris. He eventually became the chief foreign correspondent, and remained with The Times. He remained there until 1910, leaving to try his hand at freelance journalism. He authored several books and numerous articles and served as an officer during World War I. Later, Fullerton joined the staff of Le Figaro, where he remained until his death in 1952.
It was Fullerton's extensive knowledge of the world of publishing that led him to assist author Edith Wharton (with whom, at the time, he was involved) in publishing the French translation of her classic novel The House of Mirth, through a well-known magazine.
Morton has been described as “Singularly attaching… a dashing well-tailored man with large Victorian moustaches and languid eyes, a bright flower in his button hole, and the style of a ‘masher’."
After graduating, he was intimate with George Santayana and close to Bernard Berenson. Upon moving to London he befriended Hamilton Aidé and became the lover of Lord Ronald Gower.
From 1906-09 he was famously involved in an affair with American Pulitzer Prize–winning author Edith Wharton. They met in the summer of that year after being introduced by mutual friend Henry James. She undoubtedly considered him the love of her life, describing him as her "ideal intellectual partner". However they were never 'officially' together, as Wharton was already married and Fullerton's highly promiscuous personality prevented him from ever committing to a serious relationship.