The necessity of physical help can prevent physical death; Zastrozzi tells Ugo he “deserve[s] instant death,” but lets him live because his “life is at present necessary to me” (72).
Physical death mirrors spiritual death; “Verezzi lay, as if dead […] his sunken and inexpressive eye almost declared that his spirit was fled” (95).
Shelley, Percy B. Zastrozzi and St. Irvyne. Ed. Stephen C. Behrendt.