This thread is old so I don't know if this is still active. I am researching Black Bottom Strut & got hand written music from someone which a friend put into ABC & which we then converted to pdf & printed out sheet music. I added notes about how I got it, mentioned NLCR and Esther Kreek, although I haven't heard Esther's recording. I will be happy to share what I have, and especially happy if there is more information about the origin of the tune, if it was composed, and if so, by whom? etc.   I have changed the AABA format to AB format and I've been playing it for the last year, on hammered dulcimer, sharing it at jams, and plan to teach it at a workshop this coming summer. If anyone is still reading this thread and has more information please contact me @d.h.decker@juno.com. Thanks!