The policeman looked at Rollo again with as near an approach to an expression of surprise on his countenance as it is possible for a policeman to manifest, since it is a part of his professional duty never to be surprised at anything or thrown off his guard. Rollo was, however, so well dressed, and was so gentlemanly in his air and bearing, that almost any one would have wondered a little to hear him say that he had no money. "I accidentally left my money all at home," said Rollo, by way of explanation. "Very well," said the policeman; "come with me." So Rollo and the policeman walked along together. As they walked they fell into conversation, and Rollo told the policeman who he was, and how he came to lose his way. The policeman was very much interested when he heard that his young friend was an American; and he asked him a great many questions about New York and Boston. He said he had a brother in Boston, and another in Cincinnati. After walking the distance of two or three blocks, the policeman said,---- "This is the end of my beat. I must now put you in charge of another officer." So saying, he made a signal to another policeman, who was on the opposite sidewalk, and then going up to him with Rollo, he said,---- "This young gentleman wishes to go to Northumberland Court. Pass him along. He is from America." So Rollo walked with the second policeman to the end of _his_ beat, talking with him all the way about America and about what he had seen in London. At the end of the second policeman's beat Rollo was placed in the charge of a third policeman; and thus he was conducted all the way, until he came in sight of Charing Cross by a succession of policemen, without ever making it necessary for any one of them to leave his beat. As soon as Charing Cross came into view, with the tall Nelson monument, in Trafalgar Square, to mark it, Rollo at once knew where he was. So he told the policeman who had him in charge there that he could go the rest of the way alone; and so, thanking him for his kindness and bidding him good by, he ran gayly home. Thus the policemen are, in many ways, the stranger's friends. They are to be found every where; and they are always ready to render any service which the passenger may require of them. Each one is furnished with a baton, which is his badge of office; a rattle, with which he calls other policemen to his aid when he requires them; a lantern for the night; and an oilskin cape for rainy weather. In winter, too, they have greatcoats, made in a peculiar fashion. * * * * *