Upon returning to their apartment, she screams in horror and makes a great commotion at finding her husband’s body lying on the floor. She then calls the police, and within the hour they are investigating. Agreeing that he was killed by a heavy, blunt object, they begin a search for the murder weapon and are quite puzzled at being unable to find it. After a few hours, Mary comments that she had forgotten to turn the oven off in all the confusion and suggests that the officers might wish to eat the now-cooked leg of lamb. Without a second thought they all set to eating and discussing the case, never realizing that the meat they are avidly devouring is in fact the missing murder weapon. Meanwhile, Mary sits in the living room and giggles softly to herself in amusement at the way in which she has tricked the police.
Pregnant and often ill, Mary Godwin had to cope with Percy's joy at the birth of his son by Harriet Shelley in late 1814 and his constant outings with Claire Clairmont. [note 3] Shelley and Clairmont were almost certainly lovers, which caused much jealously on Godwin's part.  Shelley greatly offended Godwin at one point when during a walk in the French countryside he suggested that they both take the plunge into a stream naked as it offended her principles.  She was partly consoled by the visits of Hogg, whom she disliked at first but soon considered a close friend.  Percy Shelley seems to have wanted Mary Godwin and Hogg to become lovers;  Mary did not dismiss the idea, since in principle she believed in free love .  In practice, however, she loved only Percy Shelley and seems to have ventured no further than flirting with Hogg.  [note 4] On 22 February 1815, she gave birth to a two-months premature baby girl, who was not expected to survive.  On 6 March, she wrote to Hogg:
She began writing what she assumed would be a short story. With Percy Shelley's encouragement, she expanded the tale into a full-fledged novel.  She later described that summer in Switzerland as the moment "when I first stepped out from childhood into life".  Shelley wrote the first four chapters in the weeks following the suicide of her half-sister Fanny.  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 legendary horror tales originated from the conclave.