What was the name of J.R.R. Tolkien’s medieval poem edition published with E. V. Gordon in 1925?

J.R.R. Tolkien and E. V. Gordon published an edition of Sir Gawain and the Green Knight in 1925. Their scholarly edition presented the Middle English poem with an introduction, notes, and a glossary.

The poem tells of Sir Gawain, a knight of King Arthur’s court, who accepts a mysterious challenge from the Green Knight. Its alliterative verse, vocabulary, and moral testing made it an important subject for Tolkien’s academic work.

Tolkien later translated Sir Gawain and the Green Knight into modern English, and that translation was published posthumously in 1975. The poem should not be confused with Beowulf, another Old English work central to Tolkien’s scholarship, or with The Pearl, a Middle English poem found in the same manuscript.