Rickey, I don't understand the difference as you see it. In the original version
of Petronella, where just the active couple does the turns, yes, those dancers
start on the side, move to the space, then to another side, then to a space, and
back again to their starting place.
When all four dancers became involved-- the version that Dudley dubbed
"Cirtonella" and which became the most common version in New England for
several
subsquent decades-- once the active couple had completed the first turn, all
four dancers were in a diamond. Each of the three subsequent turns moves each
dancer one-quarter around the, counterclockwise. Because the actives had started
first and had four such movements, they ended up at home, while the inactives
ended up in the middle space (inactive man above, inactive woman below) and they
needed to move out of the way to their own proper side to allow room for the
actives to proceed down the center.
Today's many dances that incorporate Petronella twirls-- David Smukler lists
more than 100 of what he's dubbed Petronella spinoffs-- tend to start with
dancers in lines. That four person ring is oriented squarely across the set,
rather than on the bias at a 45-degree angle to the lines, but the geometry
holds true. Each dancer moves one-quarter of the way around the ring with each
turn. The difference, such as it is, is in orientation, not in amount of
turning. If you start on a side, you either end up on the side again or across
the set. (e.g., if you were the left-hand dancer in a couple facing across,
after one turn, you'd be where the person on your right had been, and after a
second turn, you'd typically be across from that spot.)
However, the business of moving from a position in a line to another position in
a line also allow the possibility (clever possibility in such dances as Pigtown
Petronella and Maliza's Magical Mystery Motion) of making one turn, then joining
hands in a new foursome to make a second turn.
David Millstone
Lebanon, NH