Final answer:
The exact punishment Madam Lockton demanded for Isabel after she ran away is not given in the provided text. However, historical context suggests punishments for runaway slaves were often severe and cruel.
Step-by-step explanation:
The punishment Madam Lockton demanded for Isabel after she ran away isn't explicitly detailed in the provided texts. Based on historical context and the provided narrative passages, punishments for enslaved individuals who attempted to escape or were disobedient were often severe and inhumane, sometimes including physical violence, restraint, or worse.
Instances of brutal treatment are illustrated in the texts, such as Eliza being threatened with a hundred lashes for making noise, the murder of a young girl by Mrs. Hicks with no consequent justice, and the frequent dehumanization and violence to which enslaved individuals were subjected.
Without specific information on Madam Lockton and Isabel's story, one can infer that the demanded punishment would be harsh and potentially violent, reflecting the cruel reality of punishment mechanisms in the context of slavery. However, to provide an accurate depiction of Madam Lockton's demand for Isabel's punishment, further details or context from the question's source material would be necessary.