Meanwhile as they stood talking, the musicians were unwrapping their instruments, and the violin was repeating again and again a note struck upon the piano.
Everything was ready to begin.
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.
The rhythmic swish of the dancers sounded like a swirling pool.