Later that evening, Aubrey learns that he has been promoted to the rank of commander and has been given command of the 14-gun HM Sloop "Sophie". Meeting Maturin in the street the next day, Aubrey's joy overcomes his animosity and he invites Maturin to dine. The men discover a shared love of music, Aubrey playing the violin and Maturin the cello. On learning Maturin's profession, Aubrey asks him to join his ship. Although as a physician Maturin's expertise goes far beyond that normally expected of a naval surgeon, he agrees.