 The organisation developed from Ulick Bourke's earlier Gaelic Union and became the leading institution promoting the Gaelic Revival, carrying on efforts like the publishing of the Gaelic Journal.The League's first newspaper was An Claidheamh Soluis (The Sword of Light) and its most noted editor was Pádraig Pearse.The motto of the League was Sinn Féin, Sinn Féin amháin (Ourselves, Ourselves alone).