Written by Richard Whiting, Ray Egan, Gus Kahn in 1917. There should be some sheet music somewhere.

Here's a bio on Whiting:

Richard A. Whiting (November 12, 1891-February 10, 1938) was a writer of popular songs.

He was born in Peoria, Illinois. He attended the Harvard Military School in Los Angeles, California. Upon his graduation, Whiting began his career as a staff writer for various music publishers. In 1912, he became a personal manager.

In 1919, he moved to Hollywood and wrote a number of film scores. He wrote music, collaborating with such lyricists as BG DeSylva, Ray Egan, Johnny Mercer, Neil Moret, Leo Robin, Gus Kahn, and Sidney Clare, to produce a number of hits (listed below). He also wrote a number of scores for Broadway plays.

He was the father of singer/actress Margaret Whiting and actress Barbara Whiting Smith.

He died in Beverly Hills, California. He was inducted into the Songwriters' Hall of Fame in 1970.