Sir John Pentland Mahaffy GBE CVO (26 Feb 1839 Switzerland-30 April 1919 #Dublin).👨‍🎓@tcdalumni. Chair @HistoryTcd. Provost @tcddublin! "first & greatest teacher" of Oscar Wilde! High Sheriff Co Monaghan. Justice of Peace Co Dublin. President @RIAdawson. https://www.dib.ie/biography/mahaffy-sir-john-pentland-a5381
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