{{explanation}}
On 2nd chord, 3c+4c cross to opposite side (1,2,3x,4x)

1–
: 1c+2c & 3c+4c RHA ; All turn P RH | 1c+4c in promhold cast R one place while{2} 2c+3c lead to nearest end
9–
: 2W+1c+3M (on W side) & 2M+4c+3W (on M side) Lsh Reels on the sides, finish (2,4,1x,3x) middles facing ends
17–
: All set to person opposite | turn opposite RH, and 4c faces 1c ; 4c+1c set to and turn opposite LH, to (2,4,1x,3x) middles facing ends
25–
: Gr-Chain, starting along sidelines (2,4,1x,3x)