Walter Thornbury: The Old South Sea House, Threadneedle Street, 1873 (1887 copy). Size and medium unknown. Source: British Library HMNTS 010349.l.1. Image extracted from page 558 of volume 1 of Old and New London, Illustrated, by Walter Thornbury. Original held and digitised by the British Library. This file is from the Mechanical Curator collection, a set of over 1 million images scanned from out-of-copyright books and released to Flickr Commons by the British Library. http://commons.wikimedia.org/wiki/File:ONL_%281887%29_1.540_-_The_old_South_Sea_House.jpg