Open questions
One question, and what would settle it.
Where are the Mar Saba leaves, and would ink and paper analysis settle whether the letter is a modern forgery?
Why it is open. The leaves were removed from their printed volume at the library of the Greek Orthodox Patriarchate in Jerusalem after the examination of 1983 and have not been publicly produced since. Nobody has stated where they are. Every argument about the document, on both sides of a fifty-year dispute, therefore rests on two sets of photographs, one black and white from 1958 and one colour from 1983. No ink analysis, no paper analysis and no examination of the writing under magnification by a document examiner with the original in front of them has ever been carried out. This is not a case of scholars disagreeing about evidence; it is a case of the evidence being unavailable.
What would resolve it. Locating the leaves within the Patriarchate library and permitting a standard document examination: ink composition, comparison of the ink against other eighteenth-century writing in the same collection, paper and pen analysis, and assessment of the hand by a forensic document examiner. Any of those would bear directly on whether the writing is of the eighteenth century or the twentieth, which is the question the whole dispute turns on.
Field. Manuscript studies and Greek palaeography; forensic document examination and ink chemistry; and the cooperation of the Greek Orthodox Patriarchate of Jerusalem.