"We can find a way to hide it. Oh! Maybe if we had a bookshelf tall enough to reach the cieling, it could be bolted to the floor and the cieling, but not be pressed against the wall? And then it'd give the illusion that there was nothing behind the bookshelf, but there would be. The hammock. And it'd be nice and dark," he thought, really liking the sound of this.
"And maybe on the floor we could have the nice thick blankets," he said, not really noticing that he had begun to say we.