The original favourite and now commonly used to open a set. The distinguishing feature is the chorus, which is danced to the delicious E minor B music.
The trick here is to keep the upper half of the body as still as possible, facing across the set, while your legs do all the dancing. I hardly need to emphasise the importance of starting on the correct foot (ie. the right) if this second half is not to descend immediately into the lowest farce.
I very much doubt if the dance would have proved so popular without the tremendous tune, but it does demonstrate the palpable truth that the dances and tunes are equally important.