And then they waited for instructions. But the odd thing was that their uncle waited too. There was this moment's hesitation. They looked to him. The old fixed habit asserted itself: a grown-up must surely know more than they did. How could it be otherwise? In this case, however, the grown-up seemed in doubt. He looked at them. It _was_ otherwise. "It's so long since I played this kind of hide-and-seek," he murmured. "I've rather forgotten--" He stopped short. There certainly was a difficulty. Nobody knew in what direction to begin. "It's a snopportunity," exclaimed Judy. "I'm sure of that!" "We just look--everywhere!" cried Tim. A light broke over their uncle's face as if a ray of sunshine touched it. His mind cleared. Some old, forgotten joy, wonderful as the dawn, burst into his heart, rose to fire in his eyes, flooded his whole being. A glory long eclipsed, a dream interrupted years ago, an uncompleted game of earliest youth--all these rose from their hiding-place and recaptured him, soul and body. He glanced at the children. These things he had recaptured, they, of course, had never lost; this state and attitude of wonder was their natural prerogative; he had recovered the ownership of the world, but they had possessed it always. They knew the whole business from beginning to end--only they liked to hear it stated. That was obviously his duty as a grown-up: to stick the label on. "Of course," he whispered, deliciously enchanted. "You've got it. It's _the_ snopportunity! The great thing is to--look." And, as if to prove him right, a flock of birds passed sweeping through the air above their heads, paused in mid-flight, wheeled, fluttered noisily a second, then scattered in all directions like leaves whirled by an eddy of loose, autumn wind. "Come on," cried Tim, remembering perhaps the "dodgy" butterfly and trying to imitate it with his arms and legs. "I know where to go first. Just follow me!" "And there'll be signs, remember," Uncle Felix shouted as he followed. "Whoever finds a sign must let the others know at once."