To me, the word "quadrille" would usually suggest either Tony's definition 1 or his definition 3. Reading Tony's definition 4 reminds me that I have occasionally noticed the word "quadrille" in titles of tunes in 6/8 meter. Looking in the book _Advanced Square Dance Figures of the West and Southwest_ by Lee Owens and Viola Ruth (1950), I notice that the tunes therein include "Blackberry Quadrille," "Blacksmith's Quadrille," "Bony Smith's Quadrille," and "Ruth's Quadrille," all in 6/8. Also included, however, is a tune titled "Canyon Quadrille," which is in 2/4 (but with a lot of dotted notes). I was unaware of the usage given in Tony's definition 2: "... a set of (usually three) squares done with the same partner." Having read it, I can see how the term formerly used for those 19th-century dances in five or six figures (with the same partner, but with pauses in the the music between figures) could have come to be used for sets of three squares with the same partner as done in some areas in the mid 20th century. While looking around on Youtube a few years ago, I came across some videos of "quadrille" dances in Vienna with couples arranged not in square sets but in what resemble Becket contra lines. Here's an example: https://www.youtube.com/watch?v=1IQ1-nRxr64 Note that there is no progression. Each couple dances pretty much exclusively with the couple across from them, the only interaction with dancers from an adjacent foursome being an occasional acknowledgment as couples dance forward and back on a diagonal. The figures are of the sort that might have been danced alternately by head and side couples in a 19th-century quadrille in square formation. I'd guess that the change to a Becket-like formation was intended to reduce the amount of inactivity, to make more efficient use of floor space, or both. It might also reduce the total duration of the figures. I have no idea whether the change in formation is a recent innovation or whether it goes back many decades, perhaps even into the 19th century. While looking for a video of a quadrille in Vienna to cite in this message, I also discovered some videos of "quadrilles" as danced in Jamaica, some in square formation and some not. I won't cite any video in particular; readers who care cane easily find examples for themselves. I don't think I can offer any better speculation than anyone else about how these dances might have evolved into what they are now from whatever sort of "quadrille" or other dance might have preceded them. Lest digressions obscure my main point, I'll repeat that the notions of "quadrille" most prominent in my mind are Tony's definitions 1 and 3. --Jim <snip>