It is my feeling that in this age of "perfect" frauds, it is absolutely essential to test scientifically whenever possible these types of finds, especially when their archaeological history is unknown. So I hope that the owner of the Apocalypse of Gabriel will agreed to this ink testing, and the sooner the better. Otherwise the Apocalypse of Gabriel will go the way of the James' ossuary and the Secret Gospel of Mark. Knohl also told me that writing on stone with ink is known in the Dead Sea area. There is an example from Qumran and many examples from Zoar, at the southern end of the Dead Sea. I have not studied these examples yet, so I cannot comment on them here.
Here is a copy of Knohl's letter:
I have read with interest your learned comment on my recent article in BAR and would like to respond to it.
You are absolutely right that ancient artifact should be checked by experts from various fields in order to establish their authenticity. In fact this is exactly what was done with regard to the Gabriel Revelation: The stone itself was checked by Prof. Yuval Goren, head of the Archeology department of Tel Aviv university. The script was checked by Dr. Ada Yardeni who is the best expert of the paleography of the Hebrew script of this period and the Languish was checked by Prof. Moshe Bar Asher, President of the Academy of the Hebrew languish. All three experts confirmed the authenticity of the artifact!
By the way, Ada Yardeni who was the first to read and publish this text agrees now with my reading of the crucial line, line 80 of the text where we have the words "In three day live, I Gabriel". She expressed her agreement with my reading in a letter to Hershel Shanks which is now published as an appendix to my article in the BAR website, under the title "web extras".
Finally, I would like to respond to your comment about the apocryphal writings that I have referred to in my article. You are of course right that these Jewish writings were later on edited by Christians thus there is a possibility of later Christian additions. In fact, I have dealt with this issue in length in my scholarly article at the April issue of the Journal of Religion. However, I do believe that the fact that "Ephraim" is mentioned in the Gabriel Revelation, which is clearly pre-Christian text, beside "My servant David" supports the view that these are not later Christian interpolations.
I would be happy if you could my response in you website.
Thank you in advance and best wishes,
Yehezkel Kaufmann Professor of Bible
The Hebrew University