1911 Encyclopædia Britannica, Volume 17… (1911)
“ The special interest of Map lies in the perplexing question of his relation to the Arthurian legend and literature. He is invariably cited as the author of the Lancelot proper (consisting of two parts) , the Queste and the Mort Artus, all three of which are now generally found in one manuscript under the title of Lancelot. The Mort Artus, however, we know to be the prose working over of an earlier and independent poem. ”
