And while we are discussing London, let me recommend you to make a point of getting acquainted with the London policeman. He is a truly great man. Watch him directing the traffic down in the City, or where Wellington Street, on its way to Waterloo Bridge, crosses the Strand. He has no semaphore, no whistle; but simply extends an arm, or turns his back, and the traffic swings to right or left, or stops altogether. Foreign cities, even New York, are not ashamed to send their police to London to pick up hints on traffic control from the London “Bobby.” Watch him handle an unruly crowd. He is unarmed, and though he carries a club, you seldom see it. If you get lost, ask him to direct you, for he carries a map of London inside his head. He is everybody’s friend. By the way, if he wears a helmet he is one of the regular force. A flat cap is a sign of a “Special”—that is, a business man who is giving his spare time, by day or night, to take the place of those policemen who have joined the Colours. But, “Regular” or “Special,” he is there to help you. There are no skyscrapers in England. The fact is, London is no place for skyscrapers. It was New York which set the fashion. That was because Manhattan Island, with the Hudson on one side and the East River on the other, is physically incapable of expansion, and so New York, being unable to spread out, shot upwards. Moreover, New York is built on solid rock—you ask the Subway contractors about that!—while the original London was built on a marsh, and the marsh is there still. So it will not support structures like the Woolworth Building. Most of our national highways start from London. There is one, a Roman road, called Watling Street, which starts from the Marble Arch and runs almost as straight as a rod from London to Chester, nearly two hundred miles; and it never changes its name after the first few miles, which are called the Edgware Road. Another, the Great North Road, runs from London to Edinburgh, and is four hundred miles long. One hundred years ago the mail coaches thundered along that road night and day, and highwaymen had their own particular pitches where no other highwaymen dreamed of butting in. Five years ago that road was a running river of touring automobiles. Now, strings of grey military motor lorries rumble up and down its entire length. Perhaps you will ride on some of them.