Complex sentence: Six months later the "great suitcase debacle" happened, when, on her way to Lausanne to join him, Hadley had a suitcase stolen at Gare de Lyon train station containing all of Hemingway's manuscripts, including duplicates.
Split into simpler sentences: Six months later the "great suitcase debacle" happened. On her way to join Ernest in Lausanne, Hadley had a suitcase stolen at Gare de Lyon train station containing all of his manuscripts, including duplicates.