Gambols (This dance will not be taught or prompted at the ball. For those who know.) 
2/4 4-cpl longways set, tune "The Shepherd and Shepherdess," not in Barnes
Jenna Simpson 2011/2014 
https://www.youtube.com/watch?v=45oP-aSQib8

A1 1-4 At the ends, W1 and M4, followed by partners, cast around neighbor to end improper in 2nd and 3rd
       places, respectively, while middle couples half poussette CW to nearest ends.
   5-8 1s and 4s single file circle CCW once round in middle (skipping step).  Order of set is now 2s
       proper at top, 1s improper in 2nd place, 4s improper in 3rd place, 3s proper at bottom.

A2 1-8 Repeat with new end couples chasing & single file circling AS 
       new middles half poussette to the ends (order of set is now 1-2-3-4, all improper).

B1 1-8 Circle 8 (slipping optional) R and L. 

B2 1-4 M2 following M3 and W3 following W2 (middle men down, middle women up), 
       dance R-shoulder half heys for 3 at the ends (each middle pair acting 
       as a single unit going into the heys, ending on their own sides to face
       partners across).  End 1-3-2-4, all proper.
   5-8 All 2-hand turn partner once around, pull back right shoulder to turn away from partner into 
        lines of 4 facing out on own side.

C1 1-8 Lines lead out on the sides, fall back bending into circles, circle 4 once round 

C2  1-8 All turn away from the circle to form lines of 4 across the set facing out (up and down).  
        Lines lead up/down, fall back bending into circles, 
         circle 4 halfway and change with partner by R shoulder.  End 3-1-4-2.


The video is extremely clear and should help answer most questions.  Some useful things to point out to your
dancers include:
Before the B1 circle R, all are in original places improper.
Coming out of the B2 half hey, look for your partner across the set.  That will help the middles avoid overtaking
each other or otherwise going astray.
Heading into the C1 first line of 4 all are proper, in a line of women and a line of men.
Heading into the C2 second line of 4, your partner will be in your line of 2 women and 2 men.