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| | Subterranea Britannica: Sites: Tower Subway |
 | | The Tower Subway's chief claim to fame is that it is the world's first tube railway, that is, an underground railway constructed in a tube rather than in a brick tunnel. |
 | | From Tower Hill it runs in a south-west direction, and, passing under Barclay's brewery, opens under a shaft similar to that at entering, but only fifty feet deep, and out of this the passengers emerge within a few yards of Tooley Street, close to the railway station. |
 | | A rather steep incline of 1 in 40, curving from north-east to south-west that is to say, from Tower Hill to near Tooley Street soon leads the visitor from the London clay beneath the land to the London clay beneath the water, and a difference of temperature between the two is at once perceptible. |
| www.subbrit.org.uk /sb-sites/sites/t/tower_subway/index.shtml (1407 words) |
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