“The Black Rogue” is a popular session tune that appears on over 125 albums under various titles, including “An Rógaire Dubh,” “Billy O’Rourke’s,” “The Blarney Castle,” “The Sack of Potatoes,” and “Sail Round the Rocks.” The Dubliners called it “The Octopus Jig,” for reasons that are apparent in this performance. The first part of the tune sounds like it’s in A Mixolydian, but resolves to D in the last bar, and the second part is clearly in the key of D. In this video, Flynn shows you the A part of the tune.