To expand a little more on Hallmarks census list of Mortons born in Longford. The first 6 have fathers named Thomas. John Henry, Grace Jane, and Sarah are linked together through the 1884 wedding details and to Thomas Morton who died 10 July 1881 by Grace Jane. If Revolution has linked Elizabeth to the same Thomas then the assumption has to be that these first 4 are likely to be siblings - despite the massive range of birth years - with the possibility that the next two are twins and all 6 are siblings.
Elizabeth(Eliza)Morton b 15/6/1841 Longford, Bpt 25/7/1841, mrd Robert Searight(1841-1873) NZ, mrd Moore Ellis Mawhinney.
Sarah Morton b c1852, Mrd Thomas Clarke 7/3/1884 Dromcliffe Ennis, Mrd Michael Gloster 19/9/1887 Galway. D 9/5/1891 Kilchreest A:39.
Grace Jane Morton b c1861/1866 Longford, Mrd Thomas Hicks 7/3/1884 Dromcliffe, CS 1901 7 Dovea Lower Kilrush A:40, CS 1911 8 Dovea A:50, D1931 thurles A:65.
John Henry Morton b c1855 Longford, mrd Annie(? Drogheda 1878 ? Anne Cobban? ), CS 1901 2 Dromore Ruan Clare A:46,CS 1911 5 Dromore Ruan Clare, d 11/1/1922 Dromore A:67.
Edward Morton b c1851 Longford, mrd Ellen Ashe 27/3/1883 Wexford.
Thomas Morton b c1851 Longford, mrd Johanna Arthur 18/7/1889 Baltinglass Wicklow.
William Morton b1845 Longford, fathers name was John Morton, Mrd Martha Dobson - was born Cosgrave, widowed by Dobson.