On Friday I started hunting around the web for more information about the letters of James of Edessa. I knew that there was a collection in a single British Library manuscript, consisting of a bunch of letters (numbered) to John the Stylite, plus a bunch of letters to other people. But that was about it.
It seems that J. J. Van Ginkel has been working on the letters. A very useful article by him on the subject, J van Ginkel, “Greetings to a virtuous man: the correspondence of Jacob of Edessa” in “Jacob of Edessa and the Syriac culture of his day” is here in Google Books preview, and fortunately visible complete. It includes a list of all 50 extant letters here.
I will OCR this list and put it online shortly, because it must be indispensable to everyone interested in the subject.
I’ve also written to Dr van Ginkel and asked about his edition and translation, but with no response so far.