In 1880s London, Margaret Harkness and Olive Schreiner were both engaged in the socialist movement. An admirer of Schreiner, Harkness dedicated a socialist allegory to her in the late 1880s. However, in In Darkest London, Harkness uses allegorical forms less as propaganda tools and more, as Schreiner did, to evoke a sense of religious mystery. Mysterious, allegorical elements create a liminal space within Harkness’s otherwise realist novel, in which can exist the hope of a better future. This chapter sheds light on Harkness’s work through tracing her participation in the religious socialist aesthetic developed by Olive Schreiner. In situating Harkness in the context of 1880s and 1890s socialism and theology, the chapter argues that Harkness’s work was part of a literary discourse that contributed to the development of early twentieth- century Christianity and social work.