Idylls of the King

A copy of Idylls of the King containing more than the original four idylls (for example with "Gareth and Lynette," "The Coming of Arthur," or "Balin and Balan") is by definition a later, expanded edition. The original four idylls were also individually retitled later ("Enid" was eventually split into "The Marriage of Geraint" and "Geraint and Enid"), so a true first edition should still show the single original "Enid" title.