Image reproduced from Shari Benstock, No Gifts from Chance: A Biography of Edith Wharton
New York: Charles Scribner's Sons, 1994. Original photograph in the Lilly Library
Indiana University.R. W. B. Lewis's Edith Wharton: A Biography gives 1925 as the date. 
Edith Wharton in the 1920s
This is the last formal portrait of Wharton; it was taken in about 1921. She used it as the picture for her 1934 autobiography, A Backward Glance

During World War I, Wharton organized hospital committees and raised a great deal of money for the relief of refugees. She received the medal of the Legion of Honor for her work during the war.

In 1921, she won the Pulitzer Prize for her 1920 novel of Old New York, The Age of Innocence.   Other works of this period include several novels: The Glimpses of the Moon (1922) A Son at the Front  (1921), The Mother's Recompense (1925), Twilight Sleep (1927), The Children (1928), and Hudson River Bracketed (1929).  She also wrote stories and a set of four novellas published in 1924 as Old New York: "The 'Forties'" (False Dawn), "The 'Fifties'" (The Old Maid), "The 'Sixties' (The Spark), and "The 'Seventies'" (New Year's Day).

"Roman Fever," a much later work, was published in Liberty Magazine in November 1934. She received $3,000 for its publication..