In the 1831 revision Mary Shelley has Victor and his father sail directly from Dublin to Le Havre, avoiding the lengthy coach journey across England in the 1818 novel. This, perhaps, reflects a more sophisticated sense of the historical geography of the British Isles gained after her return to England in 1823. Over many centuries Ireland had maintained a commercial and cultural exchange with France that flourished independently from the frames of reference in which the British viewed the power that was increasingly its major antagonist. Napoleon's attempt to capitalize on the Wolfe Tone rebellion of 1798 underscored the dangers implicit in Ireland's independent foreign relations, leading directly to the Act of Union of 1801 in which Ireland was assimilated to the British crown.