Conversation so far:
When did W. H. Auden go to the United States?
In 1939, W. H. Auden moved to the United States and became an American citizen in 1946.
What did W. H. Auden have to do with the United States?
W. H. Auden taught from 1941 to 1945 in American universities.
What state was W. H. Auden in when he taught in American universities from 1941 to 1945?
From 1940 to 1941, W. H. Auden lived in a house at 7 Middagh Street in Brooklyn Heights in New York City, New York.
Are there any other interesting aspects about the W. H. Auden article besides his time in the United States?
W. H. Auden controversially rewrote or discarded some of his most famous poems when he prepared his later collected editions.
What is a poem that W. H. Auden discarded or rewrote?
W. H. Auden's rejected poems include Spain and September 1, 1939.
What is another example of W. H. Auden's writing during the 1939 to 1973 period besides the poem September 1, 1939?
In 1940 W. H. Auden wrote a long philosophical poem New Year Letter, which appeared with miscellaneous notes and other poems in his book of poems The Double Man.
What is the name of one of the other poems in the book of poems The Double Man by W. H. Auden besides New Year Letter?
The book of poems The Double Man by W. H. Auden begins with a verse Prologue followed by a long three-part philosophical poem in octosyllabic couplets.

Question: What is a popular work that he did during this time period?
Self-contained rewrite: What is a popular work that W. H. Auden did from 1939 to 1973?