Seven Swans-a-Swimming

I think it's illegal to eat swans over here, except with special permission of the Queen or someone important. I'm told the ones on Wanstead Lake were swimming quite happily today; I didn't get there to have a look, myself.Image from a little something to bring in the New Year. The Shorter New Oxford Book of Carols says "This may have been written for the rumbustious festival of the...