In 1990, an exotic Swiss-Canadian teenager of purportedly Habsburgian lineage descended on Cambridge in a cloud of cashmere. His wardrobe was unfeasibly organised, shelf after shelf of cashmere arrayed in all the hues of the rainbow. We regarded him as a thing of wonder. In those days most of us British undergraduates were deeply unsophisticated, many of us impoverished. We were just about graduating from........

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