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I don't think I ever thought the Underground Railway was a real railway, but I vaguely remember the first Subway I was ever in having pictures of Harriet Tubman on the walls which uhh kind of did make me think that way? I know I was kerblonxed when I realized that the London Underground was at first a railway underground and not the electric trains that came in later. I'm relieved to find out, after all this time, that the engines were steam-driven, not coal-fired.
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