Bloom is not being hyperbolic when he muses, "Good puzzle would be cross Dublin without passing a pub." Indeed, many intrepid walkers and pub dwellers equipped with maps have been defeated by Bloom's puzzle in the nearly 100 years since the publication of Ulysses. In 2011, however, a software developer named Rory McCann used a computer algorithm to thread the maze.

JH 2017

Photograph by Niall Carson of Rory McCann standing next to Joyce's statue on Talbot Street. Source: www.dailymail.co.uk.

McCann's computer's route, on the OpenStreetMap that he used. Source: www.dailymail.co.uk.