From the long out-of-print LP "The Dream World of Dion McGregor". This is track 8, entitled "The Mustard Battle".
McGregor talked in his sleep. He articulated strange little vignettes. Since he spent part of his life as a houseguest, his quirk was observed. Friends began to record his nocturnal ramblings. This resulted in a book and companion record in 1964, both titled "The Dream World of Dion McGregor" (both out of print and rare). In more recent years, after McGregor died, two additional CDs were released with other old recordings that were somewhat more risqué than the first selection. These CDs are still available.
By the way, the sound of honking horns and the like heard in the background is real New York traffic from the original recordings.