 Shelley's first child died in infancy, and when she began composing "Frankenstein" in 1816, she was likely nursing her second child, who was also dead by the time of "Frankenstein"'s publication.Byron managed to write just a fragment based on the vampire legends he heard while travelling the Balkans, and from this John Polidori created "The Vampyre" (1819), the progenitor of the romantic vampire literary genre.Thus two seminal horror tales originated from the conclave.