record of proceedings below," and although new proofs could be proffered, 100 it is apparent from the writings of early decretists that the review is largely concerned with errors of law in the original proceedings. In contrast with this system, the King's law in England was administered, not on a perpendicular, but on a horizontal plane—on the principle of co-ordinated or particular jurisdiction. The ecclesiastical appeal was a difficult thing to adapt, since it was by definition an invocation of a higher court to pronounce on the sentence of an inferior court, and in England a superior-inferior relationship existed only as between King's courts and local tribunals. This condition probably favored the early growth of a review jurisdiction there, but the royal courts themselves were not arranged in hierarchy, although, as we have noticed, certain distinctions inter se appear to have been tacitly observed. The germ of an hierarchical idea is implicit in the proceedings coram rege, but as long as that jurisdiction was chiefly original the idea was dormant. It is not to have an existing judgment bettered (the notion behind the transit upon appeal), but for the best available judgment ab initio that men have cases transferred from an eyre to be heard by the King himself. The cases in error from the King's courts in Ireland furnish the earliest trace of a transit to a superior authority within the royal structure; and with the assumption of an appellate function in Council and later King's Bench a locus of appeal in the sense of the canon law comes into being. 101 Once reviewing authority operated consistently upon a written record (post 1250) the conditions were present for selective poaching in the preserves of ecclesiastical law—assignment of error, stay of judgment, and review as of course. From the sources at our disposal it appears that this phase of common law development did not get well under way until the reign of Edward I, and although direct proof is wanting, it is conceivable that this quickening of interest in review jurisdiction may have been stimulated by the first-hand experience of English sovereigns with the Gascon appeals and the expansion of the French King's authority in this field, 102 a development to which the canon law made definite contribution. Long before the impact of the canonists' learning about their ordinary rem- 09 Decretum, Causa 11, q. VI, c. 41, diet. Grat. § 21; Incerti auctoris ordo iudiciarius, XX ("Debet enim allegations utriusque partis redigere in actis quae appellans debet offere illi ad quern appellavit"). 100 Summa Rufini 222 ("Qui etiam audire debet allegationes partium, sive illae quae in priori iudicio factae sunt sive alias denuo afferre voluerint"); Tancred, Ordo judiciarius, tit. 5, § 12; Deer. Greg., lib. 11, tit. XX, c. 17. 101 The later statements that the writ of error is an original and that it is a commission to try errors, and that the record is tried, are the results of pressure of the principle of co-ordinate power (cf. 2 Tidd, Practice of the Court of King's Bench, 1134). This may have had something to do with the failure to adopt canonical rules about receiving new evidence on appeal. The sanctity of the verdict is obviously a late rationalization, since the thirteenth-century certification procedure shows the verdict was open to alteration. 102 i n f rai p. x lvi.