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If we hadn’t been so parsimoious when we built our railways, and only left enough height for a man with a top hat to stand up in an open third class truck, and only made our carriages as wide as a stage coach, then we could have had wonderful double decker trains as they do in Holland and France and Germany and Switzerland. The Swiss ones seem the best designed - wider stairs and more room for luggage. And what a delight to sit so high above the countryside !