Brickmaker - The brickmaker, whom Marlow also meets at the Central Station, is a favorite of the manager and seems to be a kind of corporate spy. He never actually produces any bricks, as he is supposedly waiting for some essential element that is never delivered. He is petty and conniving and assumes that other people are too.
Chief accountant - An efficient worker with an incredible habit of dressing up in spotless whites and keeping himself absolutely tidy despite the squalor and heat of the Outer Station, where he lives and works. He is one of the few colonials who seems to have accomplished anything: he has trained a native woman to care for his wardrobe.
Pilgrims - The bumbling, greedy agents of the Central Station. They carry long wooden staves with them everywhere, reminding Marlow of traditional religious travelers. They all want to be appointed to a station so that they can trade for ivory and earn a commission, but none of them actually takes any effective steps toward achieving this goal. They are obsessed with keeping up a veneer of civilization and proper conduct, and are motivated entirely by self-interest. They hate the natives and treat them like animals, although in their greed and ridiculousness they appear less than human themselves.