1-8
: 2s & 3s cast up/down & dance down/up, change places RH on the side then
  LH with partners
9-16
: 1s+3s & 2s+4s dance RH across, change places RH on the sides then LH
  with partners.  3(1)(4)2
17-24
: 1s & 4s cast up/down & dance down/up, change places RH on the side then
  LH with partners.  3 4 1 2
25-32
: 2s lead up to 1st place & on bars 27/28 3s+4s+1s dance down, 2s+3s
  & 4s+1s circle round to left.  2 3 4 1