A heavily crevassed glacier, 15 mi long, draining the NW slopes of Mount George Murray and flowing to the coast of Victoria Land opposite the S end of Lamplugh Island. The glacier contributes to ice that flows N along the W side of Lamplugh Island and to the Cheetham Ice Tongue. First charted by the British Antarctic Expedition (BrAE), 1907-09, under Shackleton, who named it for John King Davis, first officer and later captain of the expedition ship Nimrod.