In the cabman’s shelter in “Eumaeus,” a drunk red-haired man claims to be a sailor and introduces himself as “Murphy.” But it’s unclear if anything he says is true: he tells a series of improbable stories about sailing around South America, witnessing a stabbing in Italy, and returning to Dublin that morning after seven years at sea. Oddly enough, Murphy has never heard of , even though it’s located on one of the busiest shipping lanes in the world. Combined with Murphy’s outlandish stories, this leads to doubt whether he’s telling the truth.