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

1-8
: 1s+2s also 3s+4s Set & Rotate :

: Set, rotate singly & dance on 1 place clockwise, change places RH on
  sides & dance on 1 place to own sides (1s in 2nd pl)
9-16
: All dance RSh reels of 4 on side 1s & 4s omitting last LSh pass & curve
  round to face person just passed.  2 4 1 3
17-24
: 2s+4s also 1s+3s set on sides (HS for Men & Glasgow Highlander step for
  Ladies) & turn twice with 2H
25-32
: 4s & 1s set on sides, petronella turn into centre, 1M & 4M set **while**
  ptnrs dance round each other to face ptnr & Petronella turn to sides.
   2 4 (1) (3)