Percy Shelley had been living in Windsor when he first met Mary, and it was to that
region that they moved in 1817 to set up their household in Marlow. There Mary Shelley
wrote the principal part of this novel. It is clear that in retrospect Windsor held
a special place in Mary Shelley's memories: it is the site, for instance, in which
she bases the early chapters of The Last Man (1826), with their idealized portraits
of herself and Percy Bysshe Shelley.