https://en.wikisource.org/wiki/Ante-Nicene_Fathers/Volume_I/Introductory_Note_to_the_Epistles_of_Ignatius says (note, I added the bold face for emphasis):
"The following is the original Introductory Notice:—
The epistles ascribed to Ignatius have given rise to more controversy than any other documents connected with the primitive Church. As is evident to every reader on the very first glance at these writings, they contain numerous statements which bear on points of ecclesiastical order that have long divided the Christian world; and a strong temptation has thus been felt to allow some amount of prepossession to enter into the discussion of their authenticity or spuriousness. At the same time, this question has furnished a noble field for the display of learning and acuteness, and has, in the various forms under which it has been debated, given rise to not a few works of the very highest ability and scholarship. We shall present such an outline of the controversy as may enable the reader to understand its position at the present day.
There are, in all, fifteen Epistles which bear the name of Ignatius. These are the following: One to the Virgin Mary, two to the Apostle John, one to Mary of Cassobelæ, one to the Tarsians, one to the Antiochians, one to Hero, a deacon of Antioch, one to the Philippians; one to the Ephesians, one to the Magnesians, one to the Trallians, one to the Romans, one to the Philadelphians, one to the Smyrnæans, and one to Polycarp. The first three exist only in Latin: all the rest are extant also in Greek.
It is now the universal opinion of critics, that the first eight of these professedly Ignatian letters are spurious. They bear in themselves indubitable proofs of being the production of a later age than that in which Ignatius lived. Neither Eusebius nor Jerome makes the least reference to them; and they are now by common consent set aside as forgeries, which were at various dates, and to serve special purposes, put forth under the name of the celebrated Bishop of Antioch.
But after the question has been thus simplified, it still remains sufficiently complex. Of the seven Epistles which are acknowledged by Eusebius (Hist. Eccl., iii. 36), we possess two Greek recensions, a shorter and a longer. It is plain that one or other of these exhibits a corrupt text, and
scholars have for the most part agreed to accept the shorter form as representing the genuine letters of Ignatius. This was the opinion generally acquiesced in, from the time when critical editions of these Epistles began to be issued, down to our own day."https://en.wikisource.org/wiki/Ante-Nicene_Fathers/Volume_I/Title_Page/Preface says (note, I added the bold face for emphasis) "The American Editor has performed the humble task of ushering these works into American use, with scanty contributions of his own. Such was the understanding with the public: they were to be presented with the Edinburgh series, free from appreciable colour or alloy. His duty was (1) to give historic arrangement to the confused mass of the original series; (2) to supply, in continuity, such brief introductory notices as might slightly popularize what was apparently meant for scholars only, in the introductions of the translators; (3) to supply a few deficiencies by short notes and references; (4) to add such references to Scripture, or to authors of general repute, as might lend additional aid to students, without clogging or overlaying the comments of the translators; and (5) to note such corruptions or distortions of Patristic testimony as have been circulated, in the spirit of the forged Decretals, by those who carry on the old imposture by means essentially equivalent. Too long have they been allowed to speak to the popular mind as if the Fathers were their own; while, to every candid reader, it must be evident that, alike, the testimony, the arguments, and the silence of the Ante-Nicene writers confound all attempts to identify the ecclesiastical establishment of “the Holy Roman Empire,” with “the Holy Catholic Church” of the ancient creeds."
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