Very interesting SteveG. I had found 'Cockles and Mussels, Aliv, O', definitely the Molly Malone version, as published by the Dundee Poets' Box, on the National Library of Scotland's site at http://digital.nls.uk/broadsides/broadside.cfm/id/15031 However, the probable date of publication is given as '1880-1900', so it would be great if we could establish that this is the same song published by the Glasgow Poets' Box in 1875. I look forward to further information on the GPB version - does it in fact name Geoghegan?