1-8
: All set, 1M & 3L petronella turn into centre (BtoB position), dance out
  thru partner's place & cast to R into each others place **while** 1L
  & 3M cast down/up to opp end, petronella turn into centre (BtoB
  position) & dance out to opp sides (3) 2 (1)
9-16
: All set, circle 6H round to left for 3 steps, dance in on 4th step &
  turn to right to dance round clockwise to (3) 2 (1)
17-24
: Repeat bars 1- 8 with 1s+3s changing back to original places  1 2 3
25-32
: 2s followed by 1s dance down between 3s, cast up (2s to top & 1s to 2nd
  pl), 1s followed by 3s dance up between 2s & cast (1s to bottom & 3s
  to 2nd place)  2 3 1