[001] the heir has had seisin after the death of the ancestor whose seisin is sought, because [002] if the heir, when he once has seisin [and] has made gifts, could then recur to the [003] assise, he could nullify gifts properly made by him.1
What kind of seisin bars the assise.
[005] [We thus must see what kind of seisin bars the assise and what does not. It is clear [006] that if seisin is momentary,2 so that the tenant could not have made gifts and alienations [007] in so short a time, or if he was within age so that his gifts ought not to hold, [008] or if he [was in] for a short time after the death of his ancestor, by intrusion or [009] disseisin, and was then quickly ejected,3 or the disseisee recovered against him by an [010] assise of novel disseisin, that the heir will have the assise of mortdancestor despite [011] such seisin, [because such seisin as he had is proved void or wrongful,] not only [012] because the intrusion was short, but because during it no gift, alienation or change [013] of possession was made by the heir, and if anyone was ejected he recovered4 his [014] seisin as fully and completely as he lost it. But [quaere] if, when the heir afterwards [015] claims by assise of mortdancestor and it is objected against him that he does [016] not merit it, because he usurped to himself without judgment and on his own authority [017] what he ought to claim by the assise, whether this exception ought to bar him? [018] [I do not see why not.]5 If one puts forward the exception of seisin had earlier he [019] must prove two things: that the heir has been in seisin and has made gifts while he [020] was in seisin, and was of such an age that the gifts cannot be revoked or nullified, [021] otherwise the exception will not be good. If the heir puts in a denial, the truth will [022] be declared by the assise taken in the manner of a jury. If seisin had while [the heir] [023] was below age is objected against him, it will not hurt him, because, despite such [024] seisin, if he makes gifts under age he may revoke them by an assise of mortdancestor, [025] a writ of entry or a writ of right, as he chooses, [whether he makes the gift [or] his [026] guardian or another,]6 unless he has confirmed the gifts on reaching full age. He will [027] not have the assise of novel disseisin against such donees because, though under age, [028] he withdrew freely and of his own volition. But if the guardian makes a gift while the [029] heir is within age, the heir will have an assise of novel disseisin and all the other remedies [030] aforesaid. Note that seisin [taken] earlier bars the heir from an assise of mortdancestor, [031] no matter what