I'm taking the answer from a Bukowski interview, and it is not Mitzi and/or Betty...though it may have been a different name every time he told the story.
However, as early as April 1970 those "leftover" poems were put aside for a different book which would come out some years later. Which was the title of that book?
Those early (pre-1970) books and magazine appearances are interesting, you can see that not many poems went to waste. They were used and reused and published all over the place.yep... though I think someone picked up those leftovers from the editing floor and used them for Fire Station.
I certainly didn't know Play the Piano had been 9 years in the making, so to speak.