At the end of this section, Doyle uses a classic suspense technique: the cliffhanger. Regularly employed in virtually all genres, the cliffhanger comes from a tradition of serialization and is not exclusively a mystery story tactic. Back when fiction was often printed in segments—little bits of the story published each week or month in a periodical—the cliffhanger kept people coming back for more. The cliffhanger ensured that they would buy the next issue of the magazine, that they would read the next installment, and sometimes, that the whole of the story would later be bound and sold as a book.