{{explanation}}
3s & 4s start on opp sides

1-8
: 1M & 4M cast in 1 place, set to each other & turn RH
9-16
: 1L & 4L repeat turning LH
17-24
: 2s+1s also 4s+3s dance RH across, 1s+4s dance LH across to end BtoB in
  centre facing corners (Men face Men)
25-32
: 1s & 4s dance 'Hello-Goodbye' setting (set to corners, set on sides, set
  to next corner & into centre facing ptnr) & petronella turn to pl 2 4
  (1) (3)