Thomas Sulman’s Bird’s Eye View of Glasgow (1864)is perhaps the most famous of all such views of British cities. The splendid, panoramic detail underlines Victorian Glasgow remained both commercial and industrial city: steam and sail ships sit on the Clyde at the Broomielaw, whilst the smog from new chemical industries compelled the affluent ranks to decant from the old ‘Merchant City’ to newer residences in the leafy west end. However, one of the major forces in Glasgow and Scotland’s shift from commerce to industry – transatlantic slavery – remains hidden in plain sight.