This chapter ties Richard Marsh’s novel Mrs Musgrave – And Her Husband (1895) to the anxiety surrounding the degeneration debate. The chapter argues that novel provides a unique contribution to the debate surrounding hereditary criminality by simultaneously and deliberately validating and critiquing the racist and sexist matrix that arguably informed late-nineteenth-century British culture and society. Unlike much other late-nineteenth-century fiction, the novel employs a pattern where racial and sexual discourses are repeatedly set on course only to be derailed, and derailed only to be brought back on track again.