Whoa, just re-read my comment and realized it sounds like I'm challenging cvirtue, personally, almost. Sorry, I don't mean that at all. I've been challenging, well, questioning the assertion ("Knightriders based on the Acre split") for so long over the last 20 or so years that I sometimes shoot from the hip. My bad. I apologize.
Re: It ate my reply, 2nd attempt
Until you came out with "ask an old Carolingian."