 As Blake is observing this, a series of cataclysmic and destructive events, referred to as a 'sky-quake', hits the city, the aftermath of which involves horses and dogs going completely mad and attacking everyone in sight.The reason for these happenings was that the power of the Keruvim was being used in the north by the evil Pyratheon, in his vain attempt to overthrow Riathamus.We are then introduced to Agetta Lamian, Blake's servant-girl, whose father Cadmus Lamian owns a lodging house on Fleet Street.