A poem entitled The Plagues of Ireland: an Epistle appeared at Dublin in 1824, with a view to promoting Catholic Emancipation.
He described his work as "a little sketch and hasty picturing" of the more prominent evils and grievances which should be removed before that "harassed land" of Ireland could calculate on the enjoyment of tranquility.
At the instance of James Hardiman, author of the History of Galway, Furlong undertook to produce metrical versions in English of the compositions of Carolan and other native Irish poets.
While engaged on this work, and on a poem entitled The Doom of Derenzie, Furlong died on 25 July 1827 at Dublin, and was interred in the churchyard of Drumcondra.
Several of Furlong's metrical translations, and a portrait of him, appeared in Hardiman's work on Irish minstrelsy (London, 1831).