Of his writings there exists only a letter addressed to Abelard on the Trinity, in which Roscellinus "belittles Abélard and makes merry over his castration." Hauréau brings forward his name in connection with a text: "Sententia de universalibus secundum magistrum R." ("Notices et extr. de quelques manuscr. lat.", V, Paris, 1892, 224), but this is a conjecture. We have as evidences of his doctrine texts of Anselm, Abelard, John of Salisbury, and an anonymous epigram. His share in the history of ideas and especially his nominalism have been exaggerated, his celebrity being far more due to his theological tritheism.