Opera folks know John LaTouche as the librettist for Douglas Moore's BALLAD OF BABY DOE. Given that the arias in DOE are some of the most moving in American opera, it's not surprising to learn that LaTouche was also a songwriter. He also collaborated with Vernon Duke and Leonard Bernstein.
I came across this in an old Ellington book from the 1940s that belonged to my father.
You can purchase Ella Fitzgerald's recording of it here on Amazon. The instrumental only version is here.