The Royal Albert Bridge (Viaduct) at Saltash. The Bridge carrying the railway over the estuary of the Tamar at Saltash and linking Devon and Cornwall, England. Inaugurated by Prince Albert in May 1859, this was Isambard Kingdom Brunel's last masterpiece. His use of prefabricated wrought iron tubes in this bow-string girder bridge was on a much larger scale than his innovative bridge at Chepstow. Engraving.