an Irish nationalist politician and one of the most powerful figures in the British House of Commons in the 1880s. [...] [He was] a land reform agitator, and became leader of the Home Rule League in 1880, insisting on operating independently of the Liberals, and winning great influence by his balancing of constitutional, radical, and economic issues, and by his skillful use of parliamentary procedure.
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Note that he was from a Protestant family - and this alone was cause for invidiousness feelings (for some) in Ireland at the time. (as the character Dante in Joyce's Portrait)
the greatest achievement of Parnell was the fact that he had both the great English parties bidding for his support.
[.....]
With the death of Parnell a cloud of despair seemed to settle upon the land. Chaos had come again; indeed, it had come before, ever since the war of faction was set on foot and men devoted themselves to the satisfaction of savage passions rather than constructive endeavour for national ideals.
Captain D.D. Sheehan. Ireland Since Parnell (1921)
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—Parnell! Parnell! He is dead!
James Joyce. A Portrait of the Artist as a Young Man.
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—Parnell will never come again, he said. He’s there, all that was mortal of him. Peace to his ashes.