*start (1,2,3x,4x)*  
*This dance is centro-symmetric.  The four corner positions are in 1pl and 4pl.     
During [9–24] the repeating 4-bar figure is : "2 dancers arrive in tandem at a corner, dance RHA 3 with the corner, the leading arriving dancer stays in the corner, and the other two dance on to the next corner cclw in the set."  This occurs simultaneously at both ends of alternately 2nd and 1st diagonal, 4 times in all.*    

1–
: All set | 1c/4c (each in tandem, W leading) cast clw 3 places and up/down the middle to finish between top/bottom couple (2c+3c step to end on [7–8])
9–
: Figure on 2diag. ; Figure on 1diag.
17–
: Figure on 2diag. ; Figure on 1diag. Now 1c/4c, W leading, are in the middle on M/W side dancing down/up and 2c/3c are in 4plx/1pl.
25–
: 1c+4c ½ LHA | 1c/4c (W leading) cast Lsh round 1cnr and cross to 2pl/3plx | All set (3,1,4x,2x)