After the Cid in point of time, the next enduring poetic work that was destined to have an influence on all succeeding generations, was the series of the Arthur Legends as completed in England. As in the case of the Cid these stories of King Arthur's Court, his Knights and his Round Table, had been for a long time the favorite subject of ballad poets among the English people. Just where they originated is not very clear, though it seems most likely that the original inspiration came from Celtic sources. These old ballads, however, had very little of literary form and it was not until the end of the Twelfth and the beginning of the Thirteenth Century that they were cast in their present mold, after having passed through the alembic of the mind of a great poetic and literary genius, which refined away the dross and left only the pure gold of supremely sympathetic human stories. To whom we owe this transformation is not known with absolute certainty, though the literary and historical criticism of the last quarter of a century seems to have made it clear that the work must be attributed to Walter Map or Mapes, an English clergyman who died during the first decade of the Thirteenth Century. His claims to the authorship of the Graal legend in its artistic completeness and to the invention of the character of Lancelot, which is one of the great triumphs of the Arthur legends as they were told at this time, have been much discussed by French and English critics. This discussion has perhaps been best summarized by Mr. Henry Morley, the late Professor of Literature at the University of London, whose third volume of English writers contains an immense amount of valuable information with regard to the literary history, not alone of England at this time but practically of all the countries of Europe. Mr. Morley's plan was conceived with a breath of view that makes his work a very interesting and authoritative guide in the literary matters of the time. His summation of the position of critical opinion with regard to the authorship of the Arthur Legends deserves to be quoted in its entirety: "The Arthurian Romances were, according to this opinion. {174} all perfectly detached tales, till in the Twelfth Century Robert de Borron (let us add, at Map's suggestion) translated the first Romance of the St. Graal as an introduction to the series, and shortly afterwards Walter Map added his Quest of the Graal, Lancelot, and Mort Artus. The way for such work had been prepared by Geoffrey of Monmouth's bold setting forward of King Arthur as a personage of history, in a book that was much sought and discussed, and that made the Arthurian Romances a fresh subject of interest to educated men.