Yesterday, as I was consulting the recently published ECM of Mark, I came across some patristic citations by Clem (= Clemens of Alexandria) in several variation-units in the critical apparatus: Mark 10:32/2–40 (and related in /2–4, /6–10, /15); 10:34/26–30, 32; and 10:35/4, and 6. As I turned to part 2 Supplementary Material to find the particular references, it turned out that they were to EpTheod, (Morton) Smith 61,1; 61,2 and 63,2 (see image below from the Patristic Citations database online).
So, basically, these citations are from the controversial Letter to Theodore, which was discovered by Morton Smith in the Mar Saba monastery in the Judean Desert in 1958 in the back of a 1646–edition of Ignatius' Letters, copied by hand on the endpages. Smith took photographs of the pages and published his edition of the letter in 1973 (Greek text and Smith's photos here; English translation here). The implied author, Clemens of Alexandria, makes several references to both the (canonical) Mark and the infamous Secret Gospel of Mark (Theodore had posed questions about the latter; he apparently did not have a copy).
There is an ongoing debate (though it has been a bit quiet lately) about whether this letter is genuine or a forgery (by Smith). For an introduction and negative assessment, see Stephen C. Carlson, The Gospel Hoax: Morton Smith's Invention of Secret Mark (Waco, TX: Baylor, 2005). For debate, see Tony Burke, ed., Ancient Gospel or Modern Forgery? The Secret Gospel of Mark in Debate (Eugene: Cascade Books, 2013).
I have heard that Geoffrey Smith and Brent Landau are currently working on a new book,
The Secret Gospel of Mark: A Rogue Scholar, A Controversial Gospel of
Jesus, and the Fierce Debate Over Its Authenticity (Yale University Press, 2022?). Does someone know what they will argue? We will see whether they will put an end to the debate.
In any case, these patristic citations are not included in Nestle-Aland 28, but will they be included in Nestle-Aland 29? I hope not, perhaps it was just a mistake. In my opinion, these citations should be treated with great caution and not on a par with Clement's other writings. What is your opinion?
If you are all fed up with this topic, you can always listen to and sing along with us at the ETC blogdinner in San Diego here.
Update: Greg Paulson of the INTF informs us in a comment to the original post that, in light of this information, the editors have decided to add question marks to the references to EpTheod in the database (see image below), and "until a better scholarly consensus is reached" (of its genuineness), it will not be included in future Nestle-Aland editions. I am glad we caught this one.