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Keywords:
CONSTRUCTION,
SETTING OUT,
TUNNELS,
CLAYS,
TRAVERSE,
SURVEYS,
UNDERGROUND,
RAILWAYS,
EXPANSION,
STEEL,
TUNNELLING,
SHIELDS,
CHAMBERS,
FORCES,
LONDON CLAY,
GREATHEAD,
ELECTRIC,
TUBES,
BAKERLOO LINE,
DRIVING,
LONDON,
BAKER STREET,
BAKERLOO LINE,
WATERLOO,
UK,
PERRY
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© Thomas Telford and ICE
1904
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