In his book entitled, What is Literature?, Jean-Paul Sartre says of literature that, “If you name the behaviour of an individual, you reveal it to him; he sees himself. And since you are at the same time naming it to all others, he knows that he is seen at the moment he sees himself.” It seems that literature, according to Sartre, was a medium in which the writer could expose the subject to himself in a way impossible for him to see on his own-- perhaps a reflection allowing the subject to see himself as others saw him. We know that Sartre has written plenty about others, both in his fictional and in his philosophical works (and often the two are one and the same). However, what textual truths may we learn of Sartre in the literature of his closest friends and acquaintances? This paper seeks to consider what is revealed not only about Sartre himself, but also about the relationship between Sartre, Camus, and Beauvoir through an examination of The Mandarins by Simone de Beauvoir.