General description of the Britannia and Conway tubular bridges on the Chester & Holyhead Railway / Published, with the permission of Robert Stephenson ... by a resident assistant [E. Clark?].

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General description of the Britannia and Conway tubular bridges on the Chester & Holyhead Railway / Published, with the permission of Robert Stephenson ... by a resident assistant [E. Clark?]. Public Domain Mark. Source: Wellcome Collection.