The stranger, who the reader soon learns is Victor Frankenstein, begins his narration. He starts with his family background, birth, and early childhood, telling Walton about his father, Alphonse, and his mother, Caroline. Alphonse became Caroline’s protector when her father, Alphonse’s longtime friend Beaufort, died in poverty. They married two years later, and Victor was born soon after.

Frankenstein then describes how his childhood companion, Elizabeth Lavenza, entered his family. At this point in the narrative, the original (1818) and revised (1831) versions of Frankenstein diverge. In the original version, Elizabeth is Victor’s cousin, the daughter of Alphonse’s sister; when Victor is four years old, Elizabeth’s mother dies and Elizabeth is adopted into the Frankenstein family. In the revised version, Elizabeth is discovered by Caroline, on a trip to Italy, when Victor is about five years old. While visiting a poor Italian family, Caroline notices a beautiful blonde girl among the dark-haired Italian children; upon discovering that Elizabeth is the orphaned daughter of a Milanese nobleman and a German woman and that the Italian family can barely afford to feed her, Caroline adopts Elizabeth and brings her back to Geneva. Victor’s mother decides at the moment of the adoption that Elizabeth and Victor should someday marry.