 The fimbriation of the cross of St George separates its red from the red of the saltire.Apart from the Union Jack, Saint Patrick's cross has seldom been used to represent Ireland, and with little popular recognition or enthusiasm; it is usually considered to derive from the arms of the powerful FitzGerald family rather than any association with the saint.When the Anglo-Irish Treaty was concluded on 6 December 1921 and the creation of the new Irish Free State was an imminent prospect, the question arose as to whether the cross of Saint Patrick should remain in the Union Jack.