Thank you for the further comments and apologies for the delayed response - been away foir a few days and came back with covid (forthunately pretty mild)

   If you recognise notes on piano, this video is just of the pianist's
   hands playing it on keyboard

Helen - thank you, I think I did see this at one time during my search, but will revisit it.

   I think if you try Bookfinder you'll find more books available

Sage - indeed there are although still twice the price I saw a year or so ago and rather more than I want to pay!

   It's been "chordified" here:

Interesting, although it's still the chords and not the tune - and the paid for download of a midi file looks to be the same, just the chords.

I have one more avenue to explore, I will see if a friend of mine in the US might be able to look at one of the library copies and give me some pointers

Paul