Is it Stevenson's or Stephenson's Bridge on
SE3925 : Stephenson's Bridge over the River Calder and
SE4025 : Stephenson's Bridge over the River Calder? As far as I know, this bridge was built by the North Midland Railway, who had appointed the Stephensons (father and son) as engineers, while the Stevensons were more known for lighthouses rather than railways.