Q. Travelling on a train recently I happened to notice two former acquaintances, sitting together and very nearly opposite me, neither of whom have I spoken to for several years. The two are unknown to one another. This unfortunate coincidence left me in a difficult situation, as one is a most agreeable and attractive young lady whom ordinarily I would gladly have engaged in conversation in the hope of renewing our acquaintance, while the other is a former barman who could easily have launched into an anecdote about my rumbustious behaviour in my student days.