in the fourth year of king Henry in the county of Wilton, [the case] of William of  Lusthall and William of Covelfield.1 And unless mention is made of all the action2  falls. If the count is begun from one who was never in seisin the action also falls;  the demandant will lose if this is admitted, as [in the roll] of Trinity term in the  third year of king Henry, near the end of the roll.3 And so if there is an error as to  the person of him on whose seisin the land is claimed, as where one claims on the  seisin of his mother when he ought to claim on that of his father, or conversely. And  so if there is error in their proper names, as where he calls the ancestor by one name  and he was called by another. And so of all others to be named in the descent. And  so if one is omitted who ought to be named, or if any degree is omitted. And so if  there is error as to the thing claimed, as where one thing is claimed for another.  Also if one fails to name someone in the count of the descent who has a greater right  than the demandant, or as much right. On this matter may be found [in the roll]  of Hilary and Easter terms in the fifth year of king Henry, near the end of the roll.4  And so if it is claimed by descent on the seisin of one who was a villein; if it is  excepted that he was free, the grand assise will proceed between demandant and  tenant by the words [to be set out below.]
To whom the right may descend.
 We must see to whom the right may descend. It is clear that it is to children,5 heirs  in the descending right line, whether males or females, present or absent, of full age  or within age, to idiots as well as those who have discretion, to lunatics as those of  sound mind,6 which could be said of the insane, whether they enjoy lucid intervals  or not. 7<That is because the descent of the right does not require the consent of the  heir, but the taking up of an inheritance does require it, because the right descends to  the absent and those without notice, but seisin is not acquired without consent.>8  Such persons, since they do not have the animus adquirendi, cannot, while in that  state, acquire seisin, if the insanity is permanent, but if it is not, they may then  [acquire and] retain, as any minor may, by authority of a tutor9 or by themselves.  And when they once begin to possess,10 they can never, while in that state, cease to  possess,11 no more than a minor may before he reaches full age.12 But stupid and weakminded  persons may, because they are able to consent and dissent,