A Man once went abroad on his travels, and when he came home he had wonderful tales to tell of the things he had done in foreign countries. Among other things, he said he had taken part in a jumping-match at Rhodes, and had done a wonderful jump which no one could beat. "Just go to Rhodes and ask them," he said; "every one will tell you it's true." But one of those who were listening said, "If you can jump as well as all that, we needn't go to Rhodes to prove it. Let's just imagine this is Rhodes for a minute: and now--jump!"