	Under the influence of Father Peter Yorke (1864–1925), Walsh became interested in many aspects of Irish culture. Tomás Ó Fiaich later commented that Walsh was one of "... a generation of students [at Maynooth] which was collectively able, multi-talented, committed and independent-minded", many of whom went on to achieve great distinction in many aspects of Irish life. However, his participation in a controversy concerning 'compulsory Irish' at the National University led to him been denied ordination at Maynooth; the ceremony instead took place at All Hallows College, Dublin, on 24 June 1909. He was also forbidden to return to pursue postgraduate studies.