Origninally to tune for 'The Dusky Night'
A triple minor longways dance
Thompson, Twenty Four Country Dance, 1777.
Recording: happy_captive--009.mp3.zip

A 1-4 First couple lead down the centre, cast up round the third couple to middle place
  5-8 Circle left in threes — first lady up with the second couple,
      first man down with the third couple.
A2 1-4 First couple lead up through the second couple and cast down to middle places.
   5-8 Circle right in threes — first lady down with the third couple,
       first man up with the second couple.
Bl 1-8 First couple lead down the centre, dance back to the top, cast to middle place.
B2 1-4 Lead out the sides:
       First couple cross the set and lead out and back in lines of three.
   5-8 First couple two hand turn partner half way,
       then cast down while third couple lead up 

The Apted editors, possibly in order to make the dance more interesting and put to use a prettier tune which had a tedious dance they did not wish to use, switched tunes to the longer 'The Dusky Night' and added a turn single in A1 to fill out tune.

For the tune 'The Dusky Night' which Thompson originally linked with it, use:

   A1 Cast off two Cu. and up again
   A2 Cross over two Cu. up again and cast off
   B1 hands 4 to left quite round at bottom and back to right
   B2 right and left at top

Video: https://www.youtube.com/watch?v=Bfjc4ZSa4hQ