“New York is the Big Apple” (Stephen Longstreet’s The Real Jazz: Old and New, 1956)

Stephen Longstreet (1907-2002) frequently wrote about jazz. In his book The Real Jazz: Old and New (1956)—not available for preview on Google Books—he wrote:
     
“New York is the Big Apple.”
 
“Once more the Big Apple” is on page 1 of Stephen Longstreet’s The World Revisited: A Travel Book with Drawings (1953).
   
     
Wikipedia: Stephen Longstreet
Stephen Longstreet (April 18, 1907 – February 20, 2002) was an American author and artist.
(...)
The world of jazz was a constant theme throughout Longstreet’s life. A number of his books dealt with jazz, Including Jazz From A to Z: A Graphic Dictionary, his 100th book, published in 1989.
   
Google Books
The World Revisited:
A Travel Book with Drawings
By Stephen Longstreet
New York, NY: Holt
1953
Pg. 1:
Once more the Big Apple
 
The Real Jazz:
Old and New
By Stephen Longstreet
Baton Rouge, LA: Louisiana State University Press
1956
Pg. ?:
New York is the Big Apple.