Thanks Pete. Thing is that with such a late date as 1289, that will not necessarily be an uncorrupted Saxon spelling. Who knows now what the first Saxons to come to Avebury really meant? We are still left with the afore mentioned spelling variations and certainly cannot be certain of any of them. I really like the Welsh-ditch, but still opt for the walled ditch and doubt if there was any real distinction between an earthen wall and an earthen ridge anyway. (Perhaps the blood and thunder brigade would prefer the slaughter ditch; Wael-dich)