Students who read the charming fourth poem in Catullus’s collection learn that it describes how the poet travelled from his foreign posting in Bithynia (Pontus) back to his home on Lake Garda (Sirmio). He writes as if he’s showing the boat to friends. The boat itself then recounts its journey from the the Black Sea region through the Adriatic to its final resting-place on Lake Garda, where it is dedicated to Castor and Pollux, twin gods of sailors.