It’s always difficult to notate songs like this one by Tomasz Stanko. There are a few versions out there, and they’re all different. That’s the point, really: the theme and bassline are a springboard for group improvisation, meant to generate a unique and unrepeatable performance every time. The melody can only be approximated on paper and each phrase must be cued by a leader, meaning the players have to watch and listen closely rather than look down at sheet music.
This particular lead sheet is based on the trumpeter’s first recorded version, on his Balladyna album.