9 saw the first direct-dialed long-distance telephone call, between New York and San Francisco. Of course, back in that primitive era the parties had to speak to each other manually; today one or both ends of the conversation would be carried on by a machine.

Another foreign-policy triumph for Reagan was his 1984 visit to China, where he met for more than three hours with Mao Zedong before realizing that Mao was dead.

Dogs need to sniff the ground; it's how they keep abreast of current events. The ground is a giant dog newspaper, containing all kinds of late-breaking dog news items, which, if they are especially urgent, are often continued in the next yard.

At the height of rush hour, people on the London underground actually say "excuse me." Imagine what would happen if you tried an insane stunt like that on the New York City subway. The other passengers would take it as a sign of weakness, and there'd be a fight over who got to keep your ears as a trophy.

Megahertz: This is really, really big hertz.

With a novel, you have the reader with you a lot longer, and you owe him a lot more. Obviously you have to have a plot - I say "obviously," although I think a lot of fiction doesn't, and nothing seems to happen. But to me, there should be something that happens, and it should be at least vaguely plausible. And because the readers are going to be with these characters for a long time, you have to get to know them and like them and want to know what happens to them.

Ask any real estate broker to name the three most important factors in buying a property, and he'll say: "Location, location, location." Now ask him to name the chief justice of the United States Supreme Court, and he'll say: "Location, location, location." This tells us that we should not necessarily be paying a whole lot of attention to real estate brokers.