I noted my source, but here is again:
THE SHROUD, 2000 YEAR OLD MYSTERY SOLVED, Wilson, 2010.
After many years of research, Wilson proves this idea in his 2010 book.
The ancient Image of Edessa was not understood by people in general to be a burial cloth. As Wilson explains, in those times a bloody grave shroud was regarded as a terribly unclean and spiritually polluted object.
Even viewing such a thing could be harmful to a person’s soul. If anyone knew that the sacred cloth bearing our Lord’s image was actual a bloody burial shroud, they kept quiet about that fact.
The Shroud was folded in such a way as to only exhibit the facial portion, and the view of that faint image does not indicate that the person depicted is deceased. The image appears as simply a brownish stain that might have been left by someone pressing a cloth to his sweaty, dirty face. The eyes of this image actually appear to be open and staring straight ahead. That is what you find on the icons and mosaics of the Image of Edessa.
I could go on about these ideas for some time here. Why don’t you read Prof. Wilson’s books? His evidence is quite good.
Here are some other sources that mention the Image of Edessa:
The Doctrine of Addai the Apostle, Deleanu (translator), 2012
Eusebius’ ECCLESIATICAL HISTORY, Cruse (translator), 2015
EDESSA ‘THE BLESSED CITY,’ Segal, 1970
The Image of Edessa, Guscin, 2009
I don’t have his book and I don’t seems to be able to borrow an ebook from the Internet Library. The Edessa image was accounted as done when Jesus was still alive before his crucifixion and the Shroud is of course post crucifixion. If the face towel and the letter from Jesus accounts are true, then the Edsessa and the Shroud items must be different. If this account is false, then the person made up the story about the image and hence such accounts of it can not be deem to be credible. Your faith in the story of Thaddeus will be seriously undermined. Nevertheless, copies of the Edessa image shows an alive and eyes open Jesus.
Accounts of the Abgar letters varies from no mention of the image, to image from the living Jesus wiping his face on the towel either (one claim in Gethsemane Garden) to one that was painted. No full body portrait nor mention of burial shroud. If it is THE burial shroud, then ALL these accounts would be lies and hence not much value can be accorded to these stories. Cherry picking would be doing a Dan Brown.
Eusebius in his Ecclesiastical History wrote about the Abgar legend did not refer to any image, nor shroud. The pilgrim nun Egeria in the 4th century saw copies of the Agbar letters and but nothing about the image. In addition there is doubt of the reply that Jesus wrote to Abgar. For instance Jesus was supposedly to have wrote :
Blessed art thou who hast believed in me without having seen me. For it is written concerning me, that they who have seen me will not believe in me, and that they who have not seen me will believe and be saved. But in regard to what thou hast written me, that I should come to thee, it is necessary for me to fulfill all things here for which I have been sent, and after I have fulfilled them thus to be taken up again to him that sent me. But after I have been taken up I will send to thee one of my disciples, that he may heal thy disease and give life to thee and thine.
The words in red would be an anachronism because nothing was written about Jesus at the time Jesus was supposed to have written this reply. The Gospels came a few decades later.
Another point that support that the Edessa Image and the Shroud being 2 distinct artifacts is from inventory listings that list them separately from various accounts when they were taken to France and/or moved around in France.
The linkage of the Edessa cloth to the Shroud I suspect is to provide a longer history for the Shroud since the Shroud made its appearance very much later. The late appearance creates serious doubt about the authenticity of the icon. Like in all antiques, claiming linkage with some famous identity raises its value compared to that owned by an unknown person. The Shroud could have wrapped some holy man other than Jesus. That possibility can not be ruled out. According to Josephus, during that period +/- 250 years of dating of the shroud, there were thousands of crucifixions. Some may be locally more famous than Jesus (Jesus didn’t get a lot of mention in Josephus writings). We should be seeing more samples than this Shroud. There is one other reported that I know of. Of the handful out of thousands of crucifixions and to p(name removed by moderator)oint this particular one as containing the body of Jesus is extraordinarily optimistic.
Ian Wilson seems to weave his story telling convincingly. But for archaeologists and historians, his stories are just not supported by evidence but suppositions.
You may want to look at alternative opinions such as “From the Mandylion of Edessa to the Shroud of Turin” by Andrea Nicolotti. I am not saying who is correct but that there are sufficient doubt cast on the Ian Wilson’s version by this author and other historians. In fact Guscin In the Image of Edessa that you cited, says that " the safest conclusion is to say that the origins of the Image of Edessa can not be established with any certainty." And yet, you say
"We now are sure that the Shroud of Turin (as it is now known) was taken to the city of Edessa by the disciple Thaddeus where he used its facial image to heal King Abgar V. " The image story only came into prominence 6 centuries later when the Persians attacked. Perhaps you can explain your version of how Thaddeus with the burial shroud and the Abgar Letters story tie in together.