=============
1937
'Count Basie' releases "One O'Clock Jump", a cross of swing and R&B. Recorded 7 July 1937, New York. Released as Decca 1363 in August 1937.
One O'Clock Jump - Count Basie en.wikipedia Count Basie
Publicity portrait of legendary jazz musician Count Basie. The Count is shown here seated,
with his arms crossed, holding a cigarette. 1930s
African-American jazz musician Count Basie playing the piano during
the Great Carnival of Swing, Randalls Island, New York, 1938.
John Hammond stages the "Spirituals To Swing" concert in New York City to highlight black musical styles. The stars of the show are the duo of singer Big Joe Turner and pianist Pete Johnson who kick off a national "boogie woogie" craze.
Duke Ellington. To Swing Out Good Cheer at Carnegie Hall, December 22, 1938. New York
American Jazz Notables: To Swing Out Good Cheer at Carnegie Hall, December 22, 1938. New York, New York: Staid Carnegie Hall will resound to hot licks when these stars of swing hold forth at the Christmas night concert to be conducted by Paul Whitman. They are here during today's (December 22) dress rehearsal. Left to right, Duke Ellington, Walter Gross, Ferde Grofe, Walter Van Cleave, Morris Rosenthal, Paul Whitman, Mrs. Rosenthal, Rosa Linda, and Ray Bargy.
John Hammond a concert "Spirituals To Swing" concert in Carnegie Hall, New York City, New York, December 23, 1938.
John Hammond a "Spirituals To Swing" concert on Christmas Eve in Carnegie Hall, New York City, New York, December 24, 1939.
At Columbia Records in 1940, from left, John Hammond, Benny Goodman,
the guitarist Charlie Christian and a Columbia A&R man.
----------
Saxophonist Louis Jordan leaves Chick Webb's band to form the Tympany Five, a slimmed down group that begins the rhythm & blues revolution.
American musician Louis Jordan with his Tympany Five in the film 'Caledonia' 1942.
=============
1939 
