The line of beauty in English country dancing

"The lines, which a number of people together form, in country dancing, make a delightful play upon the eye, especially when the whole figure is to be seen at one view as at the playhouse from a gallery.... One of the most pleasing movements in country dancing which answers to all the principles of varying at once, is what they call the "hey."

http://albionawakening.blogspot.co.uk/2016/10/what-they-call-hey-serpentine-lines-in.html