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

1-8
: All clap as 1s & 4s cross RH & cast in 1 place, 1s+4s set & dance RH
  across 1/2 way
9-16
: All clap as 4s & 1s cross RH & cast to ends, 4s+2s also 3s+1s set &
  dance RH across 1/2 way to end 2s facing 4s & 1s facing 3s
17-24
: All set & petronella turn into lines of 4 across (Man facing Man etc) &
  dance 1/2 reel of 4 across
25-32
: All set & 3/4 turn RH facing person all onto sides & chase clockwise 1/2
  way to end 3 1 (4)(2)