Bisson Frères or James Forrest Compagnie des chemins de fer de l'Ouest, 1864. Argenteuil viaduct. Paris to Dieppe line, via Pontoise. Langon viaduct over the Vilaine. Rennes to Redon line. Two (2) albumen prints, mounted on card. Legends printed on the mounts at the bottom. 24x53.5 and 36x53.5 cm