[001] is where one with no right, no spark of right, enters into vacant possession, possessed [002] neither corpore nor animo, as into an hereditas iacens before it had been taken up by [003] the heir,1 or by the chief lord by reason of wardship or as his escheat, if there are no [004] heirs, or where, after the death of [a tenant], one puts himself in seisin before the [005] tenement has come to him to whom it ought to come by a fine levied, or the modus of [006] a gift, where succession can play no part, or where, after the death of one who holds [007] for life the tenement ought to revert to the owner. [What possession must be called [008] vacant and what not, may be seen clearly enough above in the title on the acquisition [009] of possession.]2 When one having no right has so intruded himself and does not admit [010] the heir or the chief lord, as was said above, or him to whom the tenement ought to [011] revert by fine levied, by the modus of the gift, or as an escheat on the failure of heirs [012] or the commission of felony, or in any other way whatever, help is afforded those3 to [013] whom the tenement ought to revert, in several ways, depending on their several cases, [014] by the following writs. If it ought to revert to the chief lord as his escheat because one [015] enfeoffed to him and the heirs of his body issuing has died without such heir, the [016] writ is this:
Of land which ought to revert for various reasons as an escheat to a chief lord.
[018] The king to the sheriff, greeting. Put A. by gage and safe pledges that he be before [019] etc. to answer B. as to why he intruded himself into so much land with the appurtenances [020] in such a vill which C. held of the said B., and of which the same C. was seised [021] on the day he died, and which ought to revert to the same B. as to the chief lord of [022] that fee since the aforesaid C. died without an heir of his body. And have etc. Witness [023] etc.
If one has intruded himself into land which ought to revert.
[025] There is another form of the same writ, where one who is not heir has intruded himself [026] into land as though he were heir, on the seisin of the chief lord, which ought to remain [027] in his hand until the true heir has come to do to him what of right he ought to do. In [028] that case the writ is this:
By what warrant he intruded.
[030] [The king to the sheriff etc. Put A. etc.] to answer [B.] by what warrant he intruded [031] himself into so much land belonging to the fee of the said B., which the said B. had [032] taken into his hand until the true heir should come to do to him what of right he [033] ought to do, as