And a Friday bonus: Rennie’s Southwark bridge over the Thames. Cast iron spans were required for the long spans with the central 240ft span breaking the record held by 1796 Wearmouth bridge for the longest cast iron arch span. E-mag, p.32 https://t.co/ToYLb5AGKW.

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Who designed the Bell Rock lighthouse – Stevenson or Rennie? The mystery of the missing letters and families at war! Read all about it https://t.co/9Dr6CfVDlP

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