JIMMY'S RETURN (reel)
"Jimmy's return" is a traditional reel from Scotland in B minor (aeolian) with two parts of 8 bars.
We can start with three simples chords:
Then we can change some Bm by Bm7, A by A/C# and by F#m, as we can create bass lines up and down.
Then we can go further: start with a B drone (high position), change the G by a G7M and change the Bm on the B part by a Em7.
You can listen to Jimmy's Return in the album "By a while " from the concertina player Padraig Rynne (2006).