Now, from this statement it may be assumed that there must be some correspondence between the number of pence in the tunc pound and the number of erws in the maenol, otherwise why speak of each erw being assessed? But, according to the foregoing figures, there would be 1,024 erws in the maenol.[253] [p202] Each trev, which thus contains 256 erws, is to pay threescore pence. How can 256 erws be divided into quarters till each erw is assessed? Dividing the trev by four we get the gavael of sixty-four erws, and threescore pence divided by four is sixty farthings. It is evident that sixty farthings cannot be divided between sixty-four erws. But if we suppose each trev to contain four homesteads or tyddyns, then the _gavael_[254] of sixty-four erws would be the single holding belonging to a tyddyn or homestead, and the four erws in the actual tyddyn (which are to be _free_ erws) being deducted, then the sixty farthings exactly correspond with the remaining sixty erws forming the holding of land appendant to the tyddyn, and each erw would pay one farthing. We may take it then as possible that each Venedotian maenol contained four trevs, paying sixty pence each, and that each trev was a cluster of four holdings of sixty erws each, in respect of which the holders paid sixty farthings each to the _gwestva_, holding their actual tyddyns free. «A group of sixteen homesteads paid the tunc pound.» In other words, each of the eight free maenols contained sixteen homesteads, which sixteen homesteads were first classified in groups of four called trevs. Or, to put the case the other way, the eight free maenols, were divided into quarters or trevs, and these trevs again each contained four homesteads. It is evidently a tribal arrangement, clustering the homesteads numerically for purposes of the payment of gwestva, and probably the discharge of other [p203] public duties, and not a natural territorial arrangement on the basis of the village or township. «In South Wales the _trev_ is the unit for gwestva.» Turning now to the Dimetian and Gwentian Codes, according to which the free _trev_ instead of the maenol is the gwestva-paying unit:[255] there is first the group of twelve trevs (instead of twelve maenols) under a single maer, and under the name of _maenol_ instead of _cymwd_; but apparently all the trevs in the group of twelve[256] are free trevs. There are other groups of seven taeog-trevs making a taeog-maenol, and the maenol (instead of the cymwd) has its court, and becomes the unit of legal jurisdiction.[257] Confining attention to the free maenol, the first thing to notice is that each of the twelve free trevs of which it was composed paid its gwestva, or tunc pound in lieu of it. The trev, therefore, was the gwestva-paying unit. And as to the interior of the trev we read,-- 'There are to be four randirs in the trev, from which the king's gwestva shall be paid.'