http://www.unityinchrist.com/history/revivals.htm and http://www.unityinchrist.com/history/historycog1.htm and also http://www.unityinchrist.com/history2/index3.htm .
The current Worldwide Church of God under Joe Tkach Jr. claims we came from the Baptists in England. It would appear, realistically, that the Baptists came from Sabbatarian Churches of God much earlier, in France. His view of this history appears to be 180 degrees out from the actual truth. As far as I'm concerned, the riddle is solved.