Legend of Sir Lancelot du Lac

First published in 1901. According to Wikipedia: "Jessie Laidlay Weston (1850–1928) was an independent scholar and folklorist, working mainly on mediaeval Arthurian texts. Her best-known work is From Ritual to Romance (1920). In it she brought to bear an analysis harking back to James George Frazer on the Grail legend, arguing for origins earlier than the Christian or Celtic sources conventionally...