The Gaelic League was founded in 1893 in order to reverse the decline in the Irish Language and would become an early recruitment ground for the Irish Volunteers. The Prosperous Branch of the Gaelic League held two very successful concerts on the evening of 22nd and 23rd April 1911, where Mr. J. Bell of Monasterevin provided the star turn with a rendition of ‘The little shirt my mother made me’. The Prosperous branch also held an ‘Aeriocht’ every summer, where Irish dancing, singing and instrumental music were performed in a local field on a wooden stage. One such Aeriocht was held in ‘a suitable enclosure’ in the centre of Prosperous on Sunday 3rd August 1913, where local man, A. Nevin, gave an exhibition of Irish dancing. Musicians from Dublin, Celbridge and Prosperous also contributed, and harking back to the famous 1798 Battle of Prosperous, proceedings were concluded with the singing of ‘Who fears to speak of ‘98’.