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| | Railway Tunnels Page 1 |
 | | It was to be, as indeed it is, 2399 yards in length, with two shafts of the extraordinary size of sixty feet in diameter, not only to give air and ventilation, but to admit light enough to enable the engine-driver, in passing through it with a train, to see the rails from end to end. |
 | | In order to drive the tunnel, it was deemed necessary to construct eighteen working shafts, by which, like the heavings of a mole, the contents of the subterranean gallery were to be brought to the surface. |
 | | The tunnel, thirty feet high by thirty feet broad, was formed of bricks, laid in cement, and the bricklayers were progressing in lengths averaging twelve feet, when those who were nearest the quicksand, on driving into the roof, were suddenly almost overwhelmed by a deluge of water, which burst in upon them. |
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