(998) quo warranto; (5) the writ of habeas corpus; modes by which easements, profits à prenand (6) the writ of certiorari. - In the Roman law the præscriptio was a clause placed at the head of the pleadings (præ, before, and scribere, to write), in order to raise a kind of preliminary objection or reservation. One of the cases in which a defendant could make use of a præscriptio was where he wanted to raise the defense that the plaintiff's claim was barred by a Statute of Limitations (3 Ortolan Inst. 532), hence the modern use of the word. 1. Corporation. - Prescription is where a right, immunity or obligation exists by reason of lapse of time (infra, & 3). (Co. Litt. 113a.) Thus, where a number of persons in succession have acted and been treated as a corporation from time immemorial without being able to show any express creation, they constitute a corporation by prescription. (Mellor v. Spateman, 1 Wms. Saund. 339.) So persons may be tenants in common of land by prescription. Litt. 2310. der, franchises and other incorporeal hereditaments are created or evidenced. So, also, a privilege or exemption may be prescriptive, e. g. a modus decimandi, a de non decimando, and an exemption from toll or stallage (q. v.) Shelf. R. P. Stat. 35; see, also, Lawrence v. Jenkins, L. R. 8 Q. B. 274. 23. Prescription differs from custom in being personal, i. e. when a person claims a right by prescription, he must allege that it has been enjoyed by him and his ancestors or predecessors in title. (Co. Litt. 113b; Austin v. Amhurst, 7 Ch. D. 689. See CUSTOM.) Prescription differs from limitation in being applicable only to incorporeal hereditaments and similar rights (Co. Litt. 114a), and not to land or other hereditaments. (Shelf. R. P. Stat. 36.) This, however, does not seem to have been always the case, for Britton (1a, 29a) uses prescription in the sense both of limitation and particular custom. Villenage could also exist by prescription (Litt. § 175), and Littleton says that two persons may be tenants in common of land by title of prescription (2310); and from Coke's remarks on the point it seems that this is still law. Co. Litt. 195b; Wms. Comm. 18. With reference to the length of time required, prescription is either at common law or by statute. 24. At the common law, a title by prescription is where a right has been enjoyed from time immemorial, or time out of mind. By analogy to the old Statutes of Limitation, "time out of mind" was held to mean the first year of Richard I.'s reign, (Litt. & 170); but when this period became inconveniently long, it was held to be sufficient if evidence of the enjoyment of the right was carried back as far as living memory would go. And when the Stat. 21 Jac. 1, c. 16, limited the time for bringing a possessory action to twenty years, the courts held by analogy that if a 2. Incorporeal hereditaments.- right had been enjoyed for twenty years, it should be presumed to have been enjoyed from time immemorial; the presumption being based, according to some, More commonly, however, prescription is applied to incorporeal hereditaments and rights or obligations connected with the user of land, to signify that they have been on the fiction of a lost grant (see LosT : enjoyed as of right, (see ENJOYMENT,) and without interruption for a certain period. Thus, prescription is one of the principal GRANT); according to others, on the analogy between prescription and limitation. (Gale Easm. 159. See on this point and (999)