Dear Ruth,
this is what I found with a couple of mouse clicks… Manhattan Spiritual was written by:
Billy Maxted (January 21, 1917, Racine, Wisconsin – October 11, 2001, Ft Lauderdale, Florida) was an American jazz pianist.
Maxted started out playing and arranging for the Red Nichols big band from 1937 to 1940. He worked Ben Pollack, Teddy Powell and Will Bradley. He was a fine pianist and arranger. After serving in the Navy he provided arrangements for Benny Goodman and Claude Thornhill and co-led a band with Ray Eberle (1947–1948). His composition “Manhattan Spiritual” was a top-10 hit for Reg Owen in 1959.
Technically I would say the song is big band swing instrumental from the 1950s.
Other than that, there´s nothing more to know about.
Have fun with the lyrics!
Greetings from Berlin
Andreas