1. The trilogy consists ofRegeneration(1991),The Eye in the Door(1993), andThe Ghost Road(1995).
2. Barker repeatedly invokes these experiments with Henry Head throughout the trilogy, emphasizing how Rivers's medical training and scientific method must adapt when treating patients like Siegfried Sassoon and the fictional Billy Prior. In the second volume of the trilogy, the fictional Rivers recalls his collaboration with Head and notes to himself, that “[i]t had to be remembered Prior was no mere bundle of symptoms, but an extremely complex personality with his own views on his condition” (The Eye in the Door143). See Knutsen for an analysis that links Freudian acting out and working through to Henry Head and Rivers's theory of nerve regeneration, particularly their discovery of protopathic and epicritic nerve fibers (Knutsen aligns the protopathic with acting out and the epicritic with working through) (164).
3. Pat Barker's critical work of mourning: Realism with a difference