As she drew, Molly thought: millions of people, hundreds of millions of people, all gone. She drew the ruined Washington Monument, the broken statue of Lincoln and the words of the inscription that remained on the pedestal: One nation indi… She drew the skeletal frame of the Supreme Court Building…

They didn't move camp to the city, but slept aboard the boat every night. They were amassing too much material to take back with them; every evening when they left the city they took back loads of records, books, maps, charts, and after the evening meal each of them went over his own stack of material and tried to sort it. They made extensive notes about the condition of the buildings they explored, the contents, the usefulness of the material in them. The next expedition would be able to go straight to work.

There were the skeletons, some of them on top of the rubble, some half buried, others in the buildings. How easily they could ignore them, Ben mused. Another species, extinct now, a pity. Pass on.

On the ninth evening they made the final choices of what to pack in the boat. They found an intact room in a partially destroyed building and stored the surplus material there for the next group.

On the tenth day they started for home, this time rowing against the current, with a fresh breeze blowing from the northeast, puffing the large single sail they had not been able to use until now. Lewis attached the tiller, and the wind drove them up the river.

Fly, fly! Molly silently urged the boat. She stood in the prow and sang out the hazards, some of them almost before they came into sight. There was a tree stump there, she remembered; and again, a train engine; a sand bar… In the afternoon the wind shifted and blew in from due north, and they had to take down the sail or risk being driven onto shore. Gradually the excitement they had all felt earlier gave way to dogged determination, and finally to mindless patience, and when they stopped for the night they all knew they had traveled little more than half the distance they had traveled on this leg of their journey toward the city.