The tall, jaunty lecturer who took his place behind the lectern in London's Royal Festival Hall was obviously a personable sort. But that was no guarantee that he would not also be a crashing bore. After all, he was pretty much of an amateur at the illustrated lecture business. His subject, "My Story of the Commonwealth Tour," sounded a bit dull, and his audience2,000 teen-agers imported by the Ministry of Education's Imperial Institute from schools in London and the Home Countieswas not the easiest kind to handle. Nevertheless, from the minute His Royal...

