I tiptoed to the back of the room and settled myself on the thick green carpet behind the big screen. What a splendid place this was! Ideal for mouse-training! I took William and Mary out of my trouser-pockets. They sat beside me on the carpet, quiet and well-behaved.

The trick I was going to teach them today was tight-rope walking. It is not all that difficult to train an intelligent mouse to be an expert tight­rope walker provided you know exactly how to go about it. First, you must have a piece of string. I had that. Then you must have some good cake. A fine currant cake is the favourite food of white mice. They are dotty about it. I had brought with me a rock cake which I had pocketed while having tea with Grandmamma the day before.

Now here’s what you do. You stretch the string tight between your two hands, but you start by keeping it very short, only about three inches. You put the mouse on your right hand and a little piece of cake on your left hand. The mouse is therefore only three inches away from the cake. He can see it and he can smell it. His whiskers twitch with excitement. He can almost reach the cake by lean­ing forward, but not quite. He only has to take two steps along the string to reach this tasty morsel. He ventures forward, one paw on the string, then the other. If the mouse has a good sense of balance, and most of them have, he will get across easily. I started with William. He walked the string with­out a moment’s hesitation. I let him have a quick nibble of the cake just to whet his appetite. Then I put him back on my right hand.

This time I lengthened the string. I made it about six inches long. William knew what to do now. With superb balance, he walked step by step along the string until he reached the cake. He was rewarded with another nibble.

Quite soon, William was walking a twenty-four inch tight-rope (or rather tight-string) from one hand to the other to reach the cake. It was wonder­ful to watch him. He was enjoying himself tremendously. I was careful to hold the string near the carpet so that if he did lose his balance, he wouldn’t have far to fall. But he never fell. William was obviously a natural acrobat, a great tight-rope walking mouse.

Now it was Mary’s turn. I put William on the carpet beside me and rewarded him with some extra crumbs and a currant. Then I started going through the same routine all over again with Mary. My blinding ambition, you see, my dream of dreams, was to become one day the owner of a White Mouse Circus. I would have a small stage with red curtains in front of it, and when the curtains were drawn apart, the audience would see my world-famous performing mice walking on tight-ropes, swinging from trapezes, turning somersaults in the air, bouncing on trampolines and all the rest of it. I would have white mice riding on white rats, and the rats would gallop furiously round and round the stage. I was beginning to picture myself travelling first-class all over the globe with my Famous White Mouse Circus, and performing before all the crowned heads of Europe.

I was about halfway through Mary’s training when suddenly I heard voices outside the Ball­room door. The sound grew louder. It swelled into a great babble of speech from many throats. I recognised the voice of the awful Hotel Manager, Mr Stringer.

Help, I thought.

But thank heavens for the huge screen.

I crouched behind it and peered through the crack between two of the folding sections. I could see the entire length and width of the Ballroom without anyone seeing me.

“Well, ladies, I am sure you will be quite com­fortable in here,” Mr Stringer’s voice was saying. Then in through the double-doors he marched, black tail-coat and all, spreading his arms wide as he ushered in a great flock of ladies. “If there is anything we can do for you, do not hesitate to let me know,” he went on. “Tea will be served for all of you on the Sunshine Terrace after you have con­cluded your meeting.” With that, he bowed and scraped himself out of the room as a vast herd of ladies from the Royal Society for the Prevention of Cruelty to Children came streaming in. They wore pretty clothes and all of them had hats on their heads.