[001] If the charter is adequate and genuine, the exception that it was made while the donor [002] was not of sound mind or sound memory may be urged against it, which may be [003] proved by the witnesses named in the charter and by the country. How this ought to [004] be proved will be explained more fully below in the title on warranty of charter.1
When one is not bound to warrant.
[006] The warrantor may also except against the tenant who vouched that though the [007] charter of feoffment is good the gift is invalid, because the donee who proffers the [008] charter, or his ancestor to whom the gift was said to be made, never had seisin of the [009] land during the donor's lifetime,2 only by intrusion after his death, because of which [010] the vouchee intends to claim it in demesne on the seisin of his ancestor, who died [011] seised thereof as of fee.
The exception that the donor was never in seisin.
[013] He may also except that [his] ancestor, who is alleged to have made the gift, was never [014] in such seisin of it that he could make a gift. A charter, which is only the vestment of a [015] gift, may be good and the gift bad for want of seisin, and conversely the gift may be [016] good and the charter bad,3 and sometimes both may be bad and thus both void. Hence [017] if a charter of gift is put forward, the warrantor must deny both, that is, the charter [018] and the gift, and thus the tenant must prove both, because of the copulative put between [019] them. Hence if he fails in the proof of one, he ought to be treated as if he has [020] failed in the proof of both. For it is not enough to prove the charter valid if the gift is [021] incomplete. He who admits the gift is bound to warrant, though he may show that the [022] charter is defective or forged, because a gift may be valid though no charter is made, [023] as [in the roll] of the eyre of William of Ralegh in the county of Buckingham, [the [024] case] of Alice de Roche.4 Though a gift is invalid at the outset for want of seisin, it [025] may later be cured by the heir, as where, when the donee is in seisin in some way, and [026] after the right has descended to the heir,5 he acknowledges his father's charter and [027] gift and takes the donee's homage, or confirms his father's gift; he cannot claim that [028] land in demesne but is bound to warrant it against others, as [in the roll] of the eyre of [029] Martin of Pateshull and his companions in divers counties after