A couple small corrections to my previos message about diagramming:
... the starting position of a duple minor contra
would look like this:
1 B 3 D 5 F ...
A 2 C 4 E 6 ..
That should read "... a duple improper contra ..."
I also wrote:
For a single-progression dance with no out-of-minor
set action, it suffices to follow couples 1A and 2B. ...
Actually there are many single-progression dances where dancers move on from one set of
neighbors to the next partway through the sequence rather that at the transition from B2
to A1. (By "B2" and "A1" I refer here to musical phrases, not to
couples in my diagram notation!) In those, dancers 1 and A dance part of the sequence
with neighbors B and 2 and the rest with neighbors D and 4.