{{explanation}}
On 2nd chord 2c+4c+6c cross to opposite side (1,2x,3,4x,5,6x).  The dance is centro-symmetric till bar 40

1–
: 1c+2c & 3c+4c &5c+6c dance ½R&L ; then ½ L-Chain, all finish BtB with P (all M face clw, all W cclw, the couples are in order 1,3,5 on W side, 2,4,6 on M side)
9–
: ½ G-Chain for 6 couples (cross at top and bottom to start)
17–
: All set to and turn person opposite RH ; set to and turn P LH ¾.  All M join RH in the centre, all W hold LH with P and join RH to next couple's joined hands.
25–
: Mill Wheel: All dance ½ round, the W in slip-steps, the M in PdB {6} | All M dance between P and W in front, to reform the longwise set as on bar 9
33–
: 1c+2c & 3c+4c & 5c+6c  ½M-Chain  (1,2x,3,4x,5,6x) ; All set, cross RH and 1c face out
41–
: 1c cast round 2c | cross between 3c ; cast round 4c, cross between 5c, cast round 6c to 6plx (other cpls up on 47–48) (2,3x,4,5x,6,1x)