Claim: The project Sonatas and Interludes, dedicated to to Maro Ajemian, was interrupted in early 1947 when Cage made a break to compose The Seasons, a ballet with music by John Cage and choreography by Merce Cunningham, first performed in 1947, but was completed by March 1958.
Evidence: Immediately after The Seasons Cage returned to Sonatas and Interludes, and by March 1948 it was completed.