How does the author use foreshadowing in Fingersmith?

Upon her arrival in London, Maud realizes that Richard has deceived her, as well as Sue. Though she is unaware of the extent and shape of that deception, her journey through the dark, winding alleys to a strange house in the slums foreshadows both the deception, and the twisting developments in the final stages of implementing Richard's plan. Maud wonders what has happened to Sue and how she is being treated. Taken into the depths of a strange city, at this moment, Maud has traded captivity by her uncle for captivity by Richard.