The Pompadour Waltz is a minor but interesting variation on the five-step Boston or five-step waltz described by Albert Newman in 1914 (and by me here). I have found it only in the collection Dance Mad, or the dances of the day, compiled by F. Leslie Clendenen and published in St. Louis in 1914.
To perform the Pompadour, the dancers alternate brief hesitating grapevine sequences with the five-step Boston in an eight-bar sequence as described below. The steps given are for the gentleman; the lady dances opposite.
