The landlady owns the house where Moll boards in Bath. The landlady does not “keep an ill House,” but she doesn’t have “the best Principles.” In other words, while the landlady does not keep a brothel, she is a prostitute. Moll and the landlady become friendly, and she introduces Moll to the gentleman. After Moll becomes pregnant with the gentleman’s child, the landlady finds her a midwife and allows Moll to rest at her house during her pregnancy.