Newly discovered Isambard Kingdom Brunel letter reveals secrets of Bristol’s Clifton Suspension Bridge

The almost 170-year-old letter, discovered by the Clifton Suspension Bridge Trust, was written during construction of the bridge offers Brunel's guidance on its final design.

It reveals evidence that without this intervention, the bridge as we know it today would likely look dramatically different.

During the early 1850s, the unfinished Clifton Suspension Bridge project was abandoned due to a lack of funds.

In 1851, American engineer Edward Wellman Serrell offered to finish the bridge using iron wire at a cheaper cost.

In response to this proposal, Brunel wrote to the bridge committee sharing his concerns regarding this quick and easy way to finish the bridge.

In his letter, Brunel said: “If you have a wire bridge, let it be as good a bridge as if you had had a bar iron one."

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Although Serrell's proposal was recorded, little was known of Brunel's response before the discovery of the letter.

The letter emphasises Brunel’s desire for the bridge not only to be strong but also to look strong, ensuring people felt confident enough to use the bridge.

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The letter is one of many artefacts now available in the archive at the Clifton Suspension Bridge Museum.

Museum archivist Dr Hannah Little said: “We are absolutely thrilled to unveil the incredible collection of historic artefacts, including Brunel’s ‘Serrell’ letter, which offer as yet undiscovered glimpses into Brunel’s thoughts leading to the final design and construction of the Clifton Suspension Bridge.

“As an accredited heritage site our archive is now richer than ever as our collection continues to grow, providing visitors with an unparalleled opportunity to connect with the remarkable history and engineering marvels of the past.

“We can’t wait to share these treasures with the public and inspire a deeper appreciation for Bristol’s iconic heritage.”