1–
: 1c lead down, cross and cast up to 2plx **while**{4} 2c set & cross down to 3plx **while**{4} 3c cast up to 1pl & cross ; all C turn RH (3x,1x,2x)
9–
: S&Link3 ; all M RHA and all W RHA, finish in lines across (1W+2c & 1M+3c)
17–
: Rsh ½ Reels3 across (1c starts in and R) ; S&Link3 (2x,1,3x)
25–
: Full diagonal R&L (3,1,2)

{{explanation}}
The progression is unusual.  The dance can be danced indefinitely in a 3c set.  In a 4c set, 3pl and 4pl must change places in the usual way after every 2nd turn.