Everywhere throughout New England you find old, tumbledown field walls, often in the middle of the deepest, most settled- looking woods- a reminder of just how swiftly nature reclaims the land in America.

So, if people didn’t settle down to take up farming, why then did they embark on this entirely new way of living? We have no idea – or actually, we have lots of ideas, but we don’t know if any of them are right. According to Felipe Fernández-Armesto, at least thirty-eight theories have been put forward to explain why people took to living in communities: that they were driven to it by climatic change, or by a wish to stay near their dead, or by a powerful desire to brew and drink beer, which could only be indulged by staying in one place.

I come Des Moines. Somebody had to.

A third...candidate for Shakespearean authorship was Christopher Marlowe. He was the right age (just two months older than Shakespeare), had the requisite talent, and would certainly have had ample leisure after 1593, assuming he wasn't too dead to work.

So here I am, my affections torn between a postal service that never feeds me but can tackle a challenge and one that gives me free tape and prompt service but won't help me out when I can't remember a street name. The lesson to draw from this, of course, is that when you move from one country to another you have to accept that there are some things that are better and some things worse, and there is nothing you can do about it. That may not be the profoundest of insights to take away from a morning's outing, but I did get a free doughnut as well, so on balance I guess I'm happy.

Cheapness is a great virtue.

Consider the Lichen. Lichens are just about the hardiest visible organisms on Earth, but the least ambitious.