From Oscar's "Boogie Blues Etudes" , live in London, 1974, we start at 2:10 and learn the walking boogie bass left hand.

Allegro, Andante, Bach's Blues; A Time For Love; How High The Moon; Soft Winds; Waltz For Debby; When You Wish Upon A Star; Duke Ellington Medley: Take The "A" Train, Don't Get Around Much Anymore, ...