A weary traveller stoppped for the night at a monastery and joined the monks for supper. After the meal was over and a little wine had passed one of the monks stood up and loudly proclaimed " 48". There were gales of laughter. When it had subsided another stood up and said "49". More laughter. And so it went on. Puzzled by this, the traveller turned to his neighbour and asked for an explanation. He explained that, as they were so cut off where they were, they never heard any new jokes, so all the jokes they knew had been given numbers, which were then shouted out, saving a long speech. "Oh, can I have a go?" the traveller asked. "Oh yes, go on, they won't mind'. He stood up and said loudly "179". The place was in uproar and the laughter lasted for several minutes. When his neighbour had stopped laughing, the traveller asked him why he had got such a riotous reception. "They hadn't heard that one" he gasped.