What happens when Twain and his traveling companions reach France in the book, The Innocents Abroad?

Unable to dock in Marseille, Twain and several of his friends have no intention of waiting, and they persuade a boatman to let them cross over in his boat to land. The boatman then mistakenly takes them to customs where they are submitted to strict interrogation. The problems they encountered could have been avoided if Twain and his friends had been patient enough to wait for the ship to dock.