The Question
Longways Country Dance, triple minor
Twelve Country Dances, for the Year 1791
Cahusac (sr), 1791

40-bar dance

16 bars	First couple cast to middle and set, 
        then turn their neighbour (3s) at the bottom; 
        then cast up to the top and set, 
        and turn their neighbour (2s) in the middle
8 bars	The first and second couples set to their neighbour, 
        the ladies join hands and change sides with the men; 
        then set to their neighbour and return

8 bars	The top two couples set to each other, then right hand star; 
        then set and left hand star back again

8 bars	The first couple lead down the middle and back, and cast off into
        second place

Easy conversion to three-couple set; 1s cast to bottom while 2s and 3s
move up.