Making use of the methodology developed in his Origins of Arthurian Romances (McFarland, 2012), the author explores the question of King Arthur's existence in several original approaches to the subject. Examining the extant literature and other evidence, the author searches for the truth of the who, when and where of King Arthur. These explorations are grouped into historicity, geography, and floruit, concluding that Arthur was an historical entity, places him in a specific area, and narrows his period of activity.