Dennis Cahill - Litir ó do chara This intimate portrait tells the story of Dennis Cahill (1954 – 2022) the master guitarist from Chicago, from his work with legendary fiddler Martin Hayes, to his role in the ground-breaking supergroup The Gloaming. Described by Hayes as “the first minimalist in traditional Irish music”, the film examines his This intimate portrait tells the story of Dennis Cahill (1954 – 2022) the master guitarist from Chicago.