Incidentally, Lilia Diamantopoulou in the 2017 Genius book p. 32 has a bit about the personal references regarding Simonides from three dignitaries including Anthimos. Those pages are showing up in Google Books nicely:
Die getäuschte Wissenschaft: Ein Genie betrügt Europa – Konstantinos Simonides (2017)
https://books.google.com/books?id=go7fDgAAQBAJ&pg=PA32
Re Simonides Symais (1849) - (p.32 of book)
"Contributing to the mystification of the fictitious author figure of Meletios is the form of communication chosen here, the letter as a self-testimony, as well as the signature of Meletios printed twice at the end in the form of a woodblock print, as well as the rich annotation apparatus and the editor’s notes Simonides, as well as his distancing as a simple ' mediator' or 'commentator' of Scripture. [9] It is also characteristic of the mystification itself that the reader keeps asking himself the question: “Who is speaking?”. Is it Simonides who is presented as the editor, is it Meletios who is presented as the writer of the Symais , are there other sources (fictitious or elsewhere) that are used to support what is said?
"Since even the supposedly 'real' character Simonides - rightly - had early doubts about his accurate biographical information , towards the end of the introduction and in the footnotes he adds three official letters of credence to the already widespread distrust of his person to counteract this, invoking the authority of the issuing officials : a) Anthimos, Archbishop of Constantinople, b) the Greek Consul General of Southern Russia in Odessa Xenophon Pappadatos, c) Colonel Tzami Karatassos and other Macedonian officers. Of course, the enclosed letters contribute nothing to the proof of the originality of the manuscript; they are only intended to prove the credibility of the publisher. Whether the letters are genuine or fake is unimportant here; they are nevertheless probable - and that is exactly what is at stake here, to convince the reader of the authenticity of the subsequent representation of the High School on Symi [10]
"Simonides closes his Prolegomena with the following sentence:
“Thank the professors who said that Simonides used to read the illegible and understand the unintelligible, and tell them: it will do you good to become a student of Simonides. And add: Simonides is wont to do this, but those who think themselves wise are wont to do evil things, such as betray traditions, and do everything in general, for the cowardly work for the alienation of the nation.”
[9] "The Symais is preceded by a terse letter from the monk Meletios of Chios to his colleague Methodios, in which he explains that he is now fulfilling his wish to introduce him to the most important painters of the Sacred Mount. Again, it is about the veracity of the account: “I have struggled long enough for true research, and found it unacceptable to confine myself only to the agiorietes, as you have already written, believing the work to be incomplete; I was often abandoned by the truth and was annoyed at the frequent dropouts”. 12 Since Meletios did not want to be limited to the hagiographers of Mount Athos, he goes back to the depiction of 377 AD. founded Apollonian school on Symi, from which emerged the first major school of hagiography (Simonides, 1849, 3 footnotes 1 and 61). However, the High School of Symi turns out to be a wondrous site in which not only did hagiography flourish, but all the great inventions and technological achievements of modern times were anticipated as early as late antiquity and the early Greek Middle Ages. The parallels to the school of Agia Marina that existed on Symi in Simonides' time are striking. Concerning the Apollonian school, the New Conversations Lexicon says:
[10] "This school is said to have been, according to the Manuscript, one of the most important of all times, and its brilliant teachers invented, among other things, paper, the telescope, the steamship, heavy artillery, copper engraving, the printing press, and the diving bell" (New Conversations Lexicon , 1865, 230)."