Fragment: This is the most recent and complete form of the lecture. It happened to be delivered in Philadelphia, Dr. Conwell's home city. When he says "right here in Philadelphia," he means the home city, town, or village of every reader of this book, just as he would use the name of it if delivering the lecture there, instead of doing it through the pages which follow.When going down the Tigris and Euphrates rivers many years ago with a party of English travelers I found myself under the direction of an old Arab guide whom we hired up at Bagdad, and I have often thought how that guide resembled our barbers in certain mental characteristics. He thought that it was not only his duty to guide us down those rivers, and do what he was paid for doing, but also to entertain us with stories curious and weird, ancient and modern, strange and familiar. Many of them I have forgotten, and I am glad I have, but there is one I shall never forget.