feet, a wide
ledge jutted out, and beyond that they could see other similar ledges
and crevices that would afford a foothold.

"We can get down that," said the Very Young Man. "There's an easy
place," and he pointed farther along the brink, to where a break in the
edge seemed to offer a means of descent to the ledge just below.

"It's going to be a mighty long climb down," said the Big Business Man.
"Especially as we're getting smaller all the time. I wonder," he added
thoughtfully, "how would it be if we made ourselves larger before we
started. We could get big enough, you know, so that it would only be a
few hundred feet down there. Then, after we got down, we could get small
again."

"That's a thought," said the Very Young Man.

The Doctor sat down somewhat wearily, and again took the papers from his
belt. "The idea is a good one," he said. "But there's one thing you
overlook. The larger we get, the smoother the wall is going to be. Look,
can't you see it changing every moment?"

It was true. Even in the short time since they had first looked down,
new crevices had opened up. The descent, though longer, was momentarily
becoming less dangerous.

"You see," continued the Doctor, "if the valley were only a few hundred
feet deep, the precipice might then be so sheer we could not trust
ourselves to it at all."

"You're right," observed the Big Business Man.

"Well, it's not very hard to get down now," said the Very Young Man.
"Let's get going before it gets any deeper. Say," he added, "how about
stopping our size where it is? How would that work?"

The Doctor was reading the papers he held in his hand. "I think," he
said, "it would be our wisest course to follow as closely as possible
what Rogers tells us to do. It may be harder, but I think we will avoid
trouble in the end."

"We could get lost in size just as easily as in space, couldn't we?" the
Big Business Man put in. "That's a curious idea, isn't it?"

"It's true," agreed the Doctor. "It is something we must guard against
very carefully."

"Well, come on then, let's get going," said the Very Young Man, pulling
the Doctor to his feet.

The Big Business Man glanced at his watch. "Twenty to ten," he said.
Then he looked up into the sky. "One hour and a half ago," he added
sentimentally, "we were up there. What will another hour bring--I
wonder?"

"Nothing at all," said the Very Young Man, "if we don't ever get
started. Come on."

He walked towards