.  Alexander lectured to a captivated audience in the picturesque city of Lisbon.  Harper sang a romantic melody, her voice echoing throughout the streets of the vibrant Portuguese capital. The pair's performance in Lisbon was met with overwhelming applause and admiration.  Alexander and Harper had the crowd enthralled with their combination of lecture and song. The citizens of Lisbon delighted in the unique combination of learning and music that the two provided.
Important Locations or Places:  1. Lisbon  2. Streets of Lisbon  3. Crowd of Lisbon Citizens