In 1816, John William Polidori travelled to Geneva as Byron's personal physician; there he met Mary and Percy Shelley and took part in the most famous house party in literary history. To pass the time in 'a wet, ungenial summer, ' the travellers took to writing ghost stories. Byron wrote his Faustian drama Manfred (1817); Mary Shelley wrote her masterpiece, Frankenstein; or The Modern Prometheus (1818). Polidori appropriated an unfished story by Byron...