and Gwinny came soberly and mournfully into the room while he was doing it. For a moment they could not believe their eyes. Then Johnny hastily slammed the door shut.
“I’ve found it!” said Caspar, bouncing away and waving the tube at them. “I’ve found it! It’s called Vol. pulv. and it works by itself. Yippee!” He suddenly felt himself becoming heavy again and was just in time to bounce himself over to his bed before the powder stopped working and he came down with a flop that made the bedsprings jangle. He sat there laughing and waving the tube at the others.
“How marvellous!” said Gwinny. “You are clever, Caspar.”
Johnny came slowly over to the bed. He took the tube and looked at it. “I was going to try this one today,” he said.
Caspar looked up at his gloomy face and understood that Johnny, not unreasonably, was feeling how unfair it was that Caspar should discover the secret, when Johnny had worked so hard over it and had just been in dire trouble about the ink as well. “You still need to do a lot of work on it,” Caspar said tactfully. “I used it dry, and it ought to be mixed with water. You’ll have to work out the right proportions.”
Johnny’s face brightened. “Yes,” he said. “And experiment to find out how much you need, not to go soaring right out of the atmosphere. I’ll have to do tests on myself, bit by bit.”
“That’s right,” agreed Caspar. “But for goodness sake don’t use too much while you do it. The tube’s less than half full already.”
“I’ve got eyes,” Johnny said crossly. Then, feeling he was being rather ungracious, he added, “I’m the Great Scientist. I think of everything.”
He tried to make good his boast by fencing off a corner of the room, so that no accidents should happen while the experiments were in progress. For the rest of the evening he sat in this pen, carefully putting the powder, grain by grain, into a test tube of water, and then bathing his big toe with the result.
“What’s the matter with Johnny?” their mother wanted to know, when she came in around bedtime.
Johnny, by this time, was bobbing an inch or so from the floor. He took hold of a chair that was part of his fence to hold himself down, and pretended not to have heard.
“I knocked over one of his experiments this afternoon,” Caspar explained anxiously, “and he doesn’t want anybody to do it again. Be careful of him. He’s very angry.”
Sally gave Johnny a puzzled look. “All right, darling. I won’t interfere. It was you I wanted to talk to anyway, Caspar.”
“About what I said about Jack? I’m sorry,” Caspar said hurriedly, dreading a scene. Scenes with his mother were always painful, not because she scolded, but because she believed in absolute honesty.
Sure enough, she said, “That’s not quite the point, darling. I could see you were hurt and miserable, and it upset me. Can’t you bring yourself to like Jack a little better? He really is very nice, you know.”
“Why should I? He doesn’t like us,” Caspar retorted with equal honesty.
“He tries,” Sally said earnestly. “I can think of at least a hundred occasions when he’s been very forebearing indeed.”
“There are about a thousand when he hasn’t,” Caspar said bitterly.
“That’s partly because you’ve been so awful,” Sally said frankly. “Truly, I’m ashamed of you most of the time – all of you, but particularly you as the eldest.”
Caspar’s face was red and he wanted to mutter again. He looked over at Johnny. Johnny looked sulkily at his big toe and gave it a slight waggle. He was hating the scene as much as Caspar, and he was also mortally afraid that he was going to rise from his pen any minute and float about.
Caspar did his best to send Sally away. “I’m sorry,” he said, sounding so sincere and nice that he made himself feel ill. “I will try.” He was quite unable to keep up this level of piety. He found himself adding, “I do try, only he keeps blaming me so.”
“You must remember,” said Sally, “that he isn’t really used to children. Malcolm and Douglas have been away at school most of the time, and he simply had no idea what it could be like.”
“He’s finding out, isn’t he?” said Caspar.
Sally laughed. “You can say that again! All right. Good night, darlings. And do try a bit harder in future.”
She went out and shut the door. Johnny gave a sigh of relief, let go of the chair and bobbed clear of the floor again.
Before he went to bed, he had risen to three feet. Caspar was rather glad to find that there was no horrible smell this time, as the mixture in the test tube grew stronger. It must have been due to all the other things Johnny had put in. They were discussing it when Malcolm, in his usual manner, knocked and came in despite being told to go away. Johnny was only just in time to pull himself over to the cupboard and pretend to be sitting on top of it.
“My father says you’re to put your light out,” Malcolm said. His eyes wandered critically to Johnny. “What are you sitting up there with one shoe off for?”
“We’ve both got one shoe off,” said Caspar, stretching out his bare foot and wriggling the toes at Malcolm’s face. “It’s the badge of our secret society. Now go away.”
“You don’t think I came in here for pleasure, do you?” Malcolm said, and went away.
Johnny looked anxiously at Caspar. “Do you think he suspected anything?”
“He’s far too flipping dim for that,” said Caspar. “But you’d better be careful. If he did find out, he’d tell the Ogre like a shot.”
“I think I’ll stop now,” said Johnny. “For tonight.” So Caspar washed his big toe for him, and Johnny climbed off the cupboard and went to bed.
The next day, Johnny skipped games and pelted home from school to continue his experiments. When Caspar came in, he found Johnny, again with one shoe off, triumphantly floating just below the ceiling.
“Look at this!” he said. “I could go higher if I put more on, only all the powder’s in the water now and I don’t want to waste it. Can you take the test tube and prop it carefully on that stand down there?”
Caspar stood on the cupboard and took the test tube from Johnny’s reaching hand. Then he climbed down and propped it upright in Johnny’s pen, while Johnny looked on tensely from the ceiling.
“What are you going to do now?” Caspar asked. “Come down?”
“I think I ought to practise a bit,” said Johnny. “You hold the door in case Malcolm comes in.”
Caspar stood against the door and watched a little wistfully while Johnny pushed off from the ceiling and swooped this way and that across the room, as Gwinny had done. It looked enormous fun. Johnny was laughing. And now that he knew what a splendid feeling it was to be nearly as light as air, Caspar could hardly wait to get up there and swoop about himself.
“Hadn’t I better shut the window?” he called up at Johnny’s whisking feet.
“It’s all right,” Johnny said happily. “It’s quite easy to control where you go. Like swimming, only not such hard work.”
Caspar watched him doing slow, swooping breaststroke through the air, and yearned to see what a fast overarm would do. “When shall we all try?”
Johnny turned over and trod water, or rather air. “What about going out tonight, after dark, for a fly round town?”
Caspar was about to say that this was the best idea Johnny had had in his life, when there was a thump on the door behind him. He flung himself against it, with his feet braced. “Go away. We’re busy.”
“Buzz