Asterius prefixed to his edition an epigram,[43] which, according to some authorities, is addressed to Macedonius, the spiritual father of Sedulius; but as Macedonius was at this time, in all probability, some forty or fifty years dead, it is much more natural to suppose that the dedication of Asterius is addressed to the Pontiff Gelasius (A.D. 492-496), especially as the Pope, about that very time, had passed a signal eulogy on Sedulius, to which we shall immediately refer. In the year A.D. 494, or as others think in A.D. 495, that Pontiff held a council of seventy bishops, most learned men, in which he published his famous decree, "De recipiendis et abjiciendis Libris," which may be regarded as the first formal publication of an Index Expurgatorius. In this decree the Pontiff, after reciting the canonical books of the Old and New Testament, gives a list of the Fathers of the Church whose writings he particularly recommends to the perusal of the faithful. In this document emanating from the supreme teaching authority in the Church, we find the following honourable mention of Sedulius:-- "ITEM VENERANDI VIRI SEDULII PASCHALE OPUS, QUOD HEROICIS DESCRIPSIT VERSIBUS, INSIGNI LAUDE PRAEFERIMUS." After this formal and emphatic approbation of the writings of Sedulius by the Pope, his works speedily became popular in all the monastic schools. Cassiodorus (A.D. 470-562), the senator, statesman, and monk, closely studied the Christian poet in his far-famed retreat on the Calabrian shore, and proclaims him by excellence the "Poet of Truth."[44] Fortunatus, the laureate of the royal and saintly Radegonde, himself the author of the _Vexilla Regis_ and the _Pange lingua_, ranks the "sweet Sedulius" with Ambrose, Jerome, and Augustine.[45] The cruel Chilperic, an unworthy grandson of the great Clovis, instead of trying to govern his people like a king, spent his time in vain attempts to imitate the stately muse of Sedulius, and of course failed miserably in the attempt. Gregory of Tours tells us that his verses had no feet to stand on, and were composed in defiance of all the laws of metre. The Irish monks of Bobbio carefully copied the poems of their great countryman, and the oldest existing MS. of the poet, which is still to be seen in the Library of the Royal Academy of Turin, is inscribed with the words--Liber Sancti Columbani de Bobbio. Isidore of Seville, the greatest scholar of his age, compares Sedulius with his own great countryman, Juvencus, and recommends the study of their works in preference to those of the Gentile poets.[46] Ildelfonsus describes him as the 'excellent' Sedulius, the poet of the Gospel, an eloquent orator, and truly Catholic writer; and another author declares that Sedulius left nothing unlearnt necessary to make him a perfect theologian, as well as a brilliant poet.[47] And in a somewhat similar strain Sedulius has been eulogised by all subsequent critics, from Bede to the present time.