This wood engraving called The Brighton Viaduct Across The Preston-Road is from the Illustrated London News on June 13, 1846. Brighton Railway Works are on the right-hand cliff top, and there is a distant view of St Peter's Church in the middle.
Steve Myall, who sent it in, says it is the earliest image of the viaduct, published just three months after completion.
Railway architect John Rastrick built the viaduct despite opposition from neighbours who preferred an embankment. By the 1870s, the viaduct was surrounded by homes, many of them stimulated by the railway.
Mr Myall is working on another book following the success of his illustrated history of the Clifton and Montpelier area of Brighton, which has sold out.