“until then there was no infallible, indisputable canon”
Were they included in Gutenberg’s bible?
Its Old Testament included the books that Jerome considered apocryphal, plus books considered apocryphal by Catholics, 3 and 4 Esdras (note nomenclature can be confusing) Prayer of Manasseh and i have read that Clement VIII later moved these to the appendix.
And why did the Polyglot Bible (1514) of Cardinal Ximenes separated the Apocrypha from the canon of the Old Testament, and soon receive papal sanction?
As for the Vulgate, the apocrypha came to be included, if not uniformly or universally in all versions and "In his famous 'Prologus Galeatus', or Preface to his translation of Samuel and Kings, he (Jerome) declares that everything not Hebrew should be classed with the apocrypha, and explicitly says that Wisdom, Ecclesiasticus, Tobias,and Judith are not in the Canon. These books, he adds, are read in the churches for the edification of the people, and not for the confirmation of revealed doctrine" (Catholic Encyclopedia, Canon of the Old Testament).
Moreover, the inclusion of apoc. books in the GB is irrelevant as it does not infer or establish an indisputable canon prior of Trent, and that Luther dissented from one and was a maverick in doing do is untenable.
The Catholic Encyclopedia states,
In the Latin Church, all through the Middle Ages [5th century to the 15th century] we find evidence of hesitation about the character of the deuterocanonicals. There is a current friendly to them, another one distinctly unfavourable to their authority and sacredness, while wavering between the two are a number of writers whose veneration for these books is tempered by some perplexity as to their exact standing, and among those we note St. Thomas Aquinas. Few are found to unequivocally acknowledge their canonicity. The prevailing attitude of Western medieval authors is substantially that of the Greek Fathers. The chief cause of this phenomenon in the West is to be sought in the influence, direct and indirect, of St. Jerome's depreciating Prologus (http://www.newadvent.org/cathen/03267a.htm)
“The Canon of the New Testament, like that of the Old, is the result of a development, of a process at once stimulated by disputes with doubters, both within and without the Church, and retarded by certain obscurities and natural hesitations, and which did not reach its final term until the dogmatic definition of the Tridentine Council. (http://www.newadvent.org/cathen/03274a.htm)
“The Council of Trent definitively settled the matter of the OT Canon. That this had not been done previously is apparent from the uncertainty that persisted up to the time of Trent." (New Catholic Encyclopedia, Catholic University of America , 2003, Vol. 3, pp. 20,26.
Decrees by non-ecumenical early councils such as Hippo, Carthage and Florence were not infallible, and thus doubts and disputes among scholars continued right into Trent. The decision of Trent in 1546 was the first “infallible” indisputable and final definition of the Roman Catholic canon, (New Catholic Encyclopedia, Vol. II, Bible, III (Canon), p. 390; The Canons and Decrees of the Council of Trent : Rockford: Tan, 1978), Fourth Session, Footnote #4, p. 17, and see below) after an informal vote of 24 yea, 15 nay, with 16 abstaining (44%, 27%, 29%) as to whether to affirm it as an article of faith with its anathemas on those who dissent from it.
Luther's own Bible contained the apocrypha, save for 1 and 2 Esdra, but separately as per an ancient tradition denoting their "second canon' status. The page to see on Luther's canon is here .
The Catholic Encyclopedia (Canon of the Old Testament) affirms, “the protocanonical books of the Old Testament correspond with those of the Bible of the Hebrews, and the Old Testament as received by Protestants.” “...the Hebrew Bible, which became the Old Testament of Protestantism.” (http://www.newadvent.org/cathen/03267a.htm)
British scholar R. T. Beckwith states, Philo of Alexandria's writings show it to have been the same as the Palestinian. He refers to the three familiar sections, and he ascribes inspiration to many books in all three, but never to any of the Apocrypha....The Apocrypha were known in the church from the start, but the further back one goes, the more rarely are they treated as inspired. (Roger T. Beckwith, "The Canon of the Old Testament" in Phillip Comfort, The Origin of the Bible [Wheaton: Tyndale House, 2003] pp. 57-64)
The Catholic Encyclopedia states, "the inferior rank to which the deuteros were relegated by authorities like Origen, Athanasius, and Jerome, was due to too rigid a conception of canonicity, one demanding that a book, to be entitled to this supreme dignity, must be received by all, must have the sanction of Jewish antiquity, and must moreover be adapted not only to edification, but also to the "confirmation of the doctrine of the Church", to borrow Jerome's phrase. (Catholic Encyclopedia, Canon of the Old Testament; http://www.newadvent.org/cathen/03267a.htm)
The Eastern Orthodox theologian Demetrios J. Constantelos also observed, "The early church as a whole did not take a definite position for or against the Deuterocanonicals. Church leaders and ecclesiastical writers of both the Greek east and Latin west were not in full agreement. Some preferred the Hebrew canon, while others accepted the longer canon that included the Deuterocanonicals. The ambivalence of ecumenical and local synods (Nicea, 325 CE; Rome, 382; Laodicea, 365; Hippo, 393) was resolved by the Trullan Synod (692). It adopted deliberations of councils that had favored the shorter list, and decisions of other synods that had advocated the longer list" . See his article “Eastern Orthodoxy and the Bible” in Bruce M. Metzger and Michael D. Coogan, eds., The Oxford Companion to the Bible (Oxford: Oxford University Press, 1993), p. 174.
Among those dissenting at Trent was Augustinian friar, Italian theologian and cardinal and papal legate Girolamo Seripando. As Hubert_Jedin explained. “he was aligned with the leaders of a minority that was outstanding for its theological scholarship” at the Council of Trent.” Jedin writes that his position was
“Tobias, Judith, the Book of Wisdom, the books of Esdras, Ecclesiasticus, the books of the Maccabees, and Baruch are only "canonici et ecclesiastici" and make up the canon morum in contrast to the canon fidei. These, Seripando says in the words of St. Jerome, are suited for the edification of the people, but they are not authentic, that is, not sufficient to prove a dogma. Seripando emphasized that in spite of the Florentine canon the question of a twofold canon was still open and was treated as such by learned men in the Church. Without doubt he was thinking of Cardinal Cajetan, who in his commentary on the Epistle to the Hebrews accepted St. Jerome's view which had had supporters throughout the Middle Ages.” (Hubert Jedin, Papal Legate At The Council Of Trent (St Louis: B. Herder Book Co., 1947), pp. 270-271)
“While Seripando abandoned his view as a lost cause, Madruzzo, the Carmelite general, and the Bishop of Agde stood for the limited canon, and the bishops of Castellamare and Caorle urged the related motion to place the books of Judith, Baruch, and Machabees in the "canon ecclesiae." From all this it is evident that Seripando was by no means alone in his views. In his battle for the canon of St. Jerome and against the anathema and the parity of traditions with Holy Scripture, he was aligned with the leaders of a minority that was outstanding for its theological scholarship.” (ibid, 281-282; https://aomin.org/aoblog/index.php?blogid=1&query=cajetan)
Cardinal Cajetan who himself was actually an adversary of Luther, and who was sent by the Pope in 1545 to Trent as a papal theologian, had reservations about the apocrypha as well as certain N.T. books based upon questionable apostolic authorship.
"On the eve of the Reformation, it was not only Luther who had problems with the extent of the New Testament canon. Doubts were being expressed even by some of the loyal sons of the Church. Luther's opponent at Augsburg, Cardinal Cajetan, following Jerome, expressed doubts concerning the canonicity of Hebrews, James, 2 and 3 John, and Jude. Of the latter three he states, "They are of less authority than those which are certainly Holy Scripture."63
The Catholic Encyclopedia confirms this saying that “he seemed more than three centuries in advance of his day in questioning the authenticity of the last chapter of St. Mark, the authorship of several epistles, viz., Hebrews, James, II Peter, II and III John, Jude...”— http://www.newadvent.org/cathen/03145c.htm Not only was the canon not settled before Trent, with Trent following one of two scholarly tradition in pronouncing the apocryphal books to be inspired, but it is still a matter of debate whether the canon of Trent is exactly the same as that of Carthage and other councils: More here on all this.
Thus while Roman Catholics often charge that Luther excluded some books as being Scripture due to doctrinal reasons, Luther did have some scholarly reasons and concurrence in Rome for his exclusions.