Dark deeds on the District Line

In 1863, the London underworld was revolutionised — not the crime statistics, but the literal underworld, when the first underground railway opened, with trains running, unimaginably, beneath the surface of the earth. This was, as the Times had pointed out when plans were first mooted, as silly as thinking of machines that could fly through the air, or of battles that could be fought in the sky, or trains running in tunnels under the Channel.