My name is Clive. I am a peripatetic music teacher. In late October, 2008, my wife and I were visting Brownsea Island, in Poole Harbour. There, we met Miss H, who had previously taught at a school I visit. In late October, 2010, we were visting Shaftesbury (of Gold Hill fame) and there, we met Miss H again. I suspect that the probability of two such chance encounters is small but would appreciate knowing just how small.