BLB-F-068561-0000 Portage in Hoarfrost River, from 'Narrative of the Arctic Land Expedition' by Sir George Back, Captain Back Edward Finden (John Murray: London, 1836), 792.e.4, opposite 116, 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): 3362 X 6000 Image sizes (cm at 300 dpi): 28 X 50 Image sizes (MB): 3.69 Color space: RGB