[4] The Irish language poetry that Cúndún composed in America survives through the letters he wrote to his relatives and former neighbors in Ballymacoda and due to the fact that his son, "Mr. Pierce Condon of South Brooklyn", arranged for two of his father's poems to be posthumously published by the New York City newspaper The Irish-American in 1858.
Kerby A. Miller also repeatedly quoted Cúndún's poetry in the 1985 book Emigrants and Exiles: Ireland and the Irish Exodus to North America.
[3] Along with fellow Irish-language poets Diarmuid na Bolgaí Ó Sé and Máire Bhuidhe Ní Laoghaire, Pádraig Phiarais Cúndún adapted the Jacobite tradition of Aisling poetry to more recent political struggles by the Irish people.
Therefore, Cúndún's poetry helped inspire the verse of more recent Irish-language poets such as Seán Gaelach Ó Súilleabháin, who adapted the Aisling tradition to the events of the Easter Rising of 1916 and the Irish War of Independence.
[5]: 238–240 Kenneth E. Nilsen, an American linguist with a specialty in Celtic languages, referred to Cúndún as "the most notable Irish monoglot speaker to arrive in this country".