After a few minutes' pause, the father, the daughter, and the son-in-law who played the horn flourished with one accord. Like the rats who followed the piper, heads instantly appeared in the doorway. There was another flourish; and then the trio dashed spontaneously into the triumphant swing of the waltz. It was as though the room were instantly flooded with water. After a moment's hesitation first one couple, then another, leapt into mid-stream, and went round and round in the eddies.