"In an era when everything can be surveiled, all we have left is politeness." — Neal Stephenson

He nodded in the direction of China. "Been doing a bit of consulting work for a gentleman there. Complicated fellow. Dead now. Had many facets, but now he'll go down in history as just another damn Chinese warlord who didn't make the grade. It is remarkable, love," he said, looking at Nell for the first time, "how much money you can make shoveling back the tide. In the end you need to get out while the getting is good. Not very honourable, I suppose, but then, there is no honour among consultants."

They went across the playing fields…the two girls walking and Miss Matheson's wheelchair carrying her along on its many-spoked smart wheels.

"Chiselled Spam," Miss Matheson said, sort of mumbling it to herself.

"Pardon me, Miss Matheson?" Nell said.

"I was just watching the smart wheels and remembering an advertisement from my youth," Miss Matheson said. "I used to be a thrasher, you know. I used to ride skateboards through the streets. Now I'm still on wheels, but a different kind. Got a few too many bumps and bruises during my earlier career, I'm afraid."

"It's a wonderful thing to be clever, and you should never think otherwise, and you should never stop being that way. But what you learn, as you get older, is that there are a few billion other people in the world all trying to be clever at the same time, and whatever you do with your life will certainly be lost — swallowed up in the ocean — unless you are doing it along with like-minded people who will remember your contributions and carry them forward. That is why the world is divided into tribes."