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Hundreds of photos showing the building of the Forth Road Bridge have been found at a time when the troubled structure remains closed due to safety concerns.
The incredible archive includes stomach-churning images of workers helping to fix the steel suspension cables into position 500ft above the Firth of Forth in Scotland.
The photos was taken for engineering firm Sir William Arrol & Co which produced and installed the steelwork for the bridge. They were retained by a member of staff who cleared out the officers when the firm went bust in the 1980s.