BLB-F-074020-0000 Viaduct over the River Colne, near Watford, from 'The London and Birmingham Railway ..' of Thoams Roscoe, G. Dodgson W. Radclyffe, (London, 1839?), 796.f.2, opposite 52, British Library, London Credit: The British Library Board/Alinari Archives, Florence WARNING: Permission must be required for non editorial use. Please contact Alinari Archives Place of photography: Great Britain, London, British Library Collection: The British Library Board/Alinari Archives, Florence Object type: digital image Photographic technique: P digital image Technical info Image sizes (pixel): 5341 X 3827 Image sizes (cm at 300 dpi): 45 X 32 Image sizes (MB): 4.10 Color space: RGB