Humphry is Moll’s son with her third husband, the plantation owner. Humphry is the only one of Moll’s 12 children to be mentioned by name, although even Humphry’s name isn’t revealed until he is well into adulthood. Moll abandons Humphry after she discovers his father is really her half-brother, and she doesn’t see her son again for over 20 years. After Moll is transported to Virginia from Newgate Prison, she sends her half-brother a letter, which is intercepted by Humphry. Humphry has been maintaining the plantation Moll’s mother left Moll in her will, and despite her long absence, he happily welcomes Moll as a mother. Humphry is a kind man who cares for his aging and senile father, and he never marries. At the end of the novel, Moll hires Humphry to continue managing her plantation, and they enjoy a pleasant and easy relationship as mother and son.