1–
: 1c cross down into Mirror Reels3 on opposite sides with 2c+3c, 1c finish in promhold facing down between 2c in 1pl
9–
: 1c+2M+2W Reel3 across (Rsh to 2M) (at end 1c start downwards)
17–
: 1c (promhold) dance between 3c, cross LH and cast up to 2pl ; turn RH and face out (see note)
25–
: 2c & 3c petronella {8} **while** 1c casts R (1M up, 1W down) | cross between setting end couples ; cast to 2plx | set (all together) (2x,1x,3x)

{{explanation}}
The set is now inverted ; repeat using the bottom (3c) as new top. In 6 times through each couple dances once as 1c from “each hemisphere”.  
Note: On [24], some dancing couples choose to face in after the RH turn and then cast into the next figure.