In the Heart of Darkness Marlow witnesses two ladies sitting in the Belgian Trading Company’s office and “knit[ting] black wool feverishly” (p.10). They represent the omniscient Fates from Greek mythology who posses control over every mortal’s “thread” of life. They sever the thread once it comes time for a person die. Through this allusion Joseph Conrad foreshadows the brutality and death that Marlow will witness on his journey into the depths of the Congo. Conrad also suggests that the Fates and ultimately the company itself, have power beyond a person’s control (i.e. Marlow and the Africans).
Here is the Disney interpretation of the Fates at 1:35!