{{explanation}}
2c and 4c cross on 2nd chord (1,2x,3,4x)

1–
: 1W+4W cast off behind own line to the other end and cross, **while{4}** the others set once and change places diagonally RH ; 2M+3M repeat (3,4x,1,2x)
9–
: All circle8 and back
17–
: 3W & 2W, each followed by the others in their line, cast to the other end of the set ; 2c+1c & 3c+4c circle4 L (2x,1,4x,3)
25–
: 2c+1c & 3c+4c RHA {3}, LHA {3} | 2c & 3c cast to middle **while{8}** 1c & 4c lead out and cross to end places, facing out (1x,2x,3,4)
33–
: Centres turn ends once EH ; 1c+2c & 3c+4c half DblFig8 across to finish, 1c+2c facing up, 3c+4c facing down (1,2,3x,4x) for
41–
: Interlocking Allemandes, finish (2,4x,1,3x)