Possibilities in the Ireland census, Barbara described as widow, ie. John dead (or otherwise gone*):http://www.census.nationalarchives.ie/pages/1901/Dublin/New_Kilmainham/Emmett_Road__North_side/1289702/http://www.census.nationalarchives.ie/pages/1911/Dublin/New_Kilmainham/Spa_View/60713/* haven't found a death yet...