That Keats in The Eve of St. Agnes was possibly indebted to Mrs. Radcliffe's The Mysteries of Udolpho was suggested to me by my colleague, Professor Margaret Sherwood, who pointed out several signs of relationship between the two works. Since that time I have made some study of the problem, and record the following observations. No attempt is here made to discuss the question raised by President MacCracken of Keats's obligation to Boccaccio's Filocolo, since it is not possible to reach final conclusions in regard to the matter without making a systematic study of the relationship of the Eve of St. Agnes to Floris and Blancheflur, Filocolo, Romeus and Juliet, Romeo and Juliet, The Mysteries of Udolpho, and Christabel.