Fer'ding noun [ See Farthing .] A measure of land mentioned in Domesday Book. It is supposed to have consisted of a few acres only. [ Obsolete] Found on http://www.encyclo.co.uk/webster/F/19
Ancient Measurement Terms: Administrative unit of land. Fourth part of a hundred. (Not necessarily exactly a quarter.)
Found on http://www.hemyockcastle.co.uk/measure.htm