There was no use in looking for the outer door. He had found the answer to their last problem, and he had to get back to the box with that answer and thrash it out with all of them. There might be a salvation for them and there might not. Leaving the screen showing the city, he jumped down off the table, raced back through the room and into the next, the dining hall. Still there were no signs of any of the giants. He had crossed the threshold of the third room when he heard a door open on his right. There was no time to gape around; he covered thirty feet in five strides, dodged under the hanging shelf of the strange yellow machine, like a low desk covered with cogwheels, and ran along beneath it till he came to the extreme end of the contrivance. A pair of feet, either of which would have outweighed a draft horse, went past him; he dared not lean forward to see the rest of the brute, but it was undoubtedly an adult. It went into the playroom. After twenty or twenty-five minutes, during which Summersby thought over the problem and agreed with himself that he couldn't find the solution alone, the giant came out of the playroom, crossed near his hiding place, and went out through a door beside the huge picture. It was not in a hurry, so he decided it had not noticed his absence from the box. He dragged an easy chair over to the nursery door. It was just four times the size of Summersby's Morris chair at home, and about eight times as heavy. As he was crawling up the leg to the seat, he recalled that he had a bad heart. If he hadn't been clinging to the plastic with both arms, he would have shrugged. He intercepted the beam and opened the door. Having no more than half a minute to get through before it shut, he had to leave the chair where it was. He hoped none of the adults would realize that its position had changed. The playroom was clean and neat. Likely it would remain unvisited through the night. He went to the box and only then remembered it was shut tight. What did the kids do when they opened it during the day? He had seen them at it twice. They laid their hands on top of the box, there on the left. Hauling over enough junk to make a pair of steps, he got onto the roof of the box. There was a bar, set into the coaming. He pressed it, leaned over, and saw the wall slide back. A second push returned it to its shut position. He opened it again, swung his legs over the edge, pressed the bar once more and dropped. Snatching up a green dowel from the floor, he jumped into the box as the door was closing. He had just time to lay the rod across the threshold, as Adam had done, before the wall reached it and was held. Trying not to breathe, Summersby picked up Watkins and slung him over his shoulder. He forced his fingers into the crack and heaved. Again he threw his weight against the wall. Then he was buckling at the knees, trying desperately to bring his mouth next to the opening, but not quite making it.