1-4
: 1s set, 1M casts to 2nd place as 1L dances Petronella turn to centre top
  (2s step up 3-4)
5-8
: LIGO (L-shape) Set+Link:

: 1L between 2s facing down & 1M between 2M & 3M on sides all join hands &
  set (in "L" shape), 2L dances to 3M's place **while** 1L+2M+1M+3M pull
  back RSh & chase clockwise 2 places round to new "L" shape, 1M
  between 2M+3M at top, 1L between 2M+3L on Ladies' side
9-12
: Repeat LIGO Set+Link: 3L dances to 1M's place, others pull back RSh &
  chase clockwise 2 places to end 3M, 1M, 2M on Ladies' side & 1L
  between 2s in 3rd place facing up
13-16
: 1s dance RSh 1/2 round each other then birl (or turn 1.1/2 RH) to
  face 1st corners (pstn)
17-24
: 1s dance 1/2 diag reel of 4 with 1st corners, pass LSh to face 2nd
  corners (pstn) & dance 1/2 diag reel of 4 with 2nd corners, 1s pass
  RSh to 2nd place own side
25-32
: 2s+1s+3s circle 6H round & back