Adam McCollum has kindly translated for me Riedel’s text of the catalogue of Arabic Christian literature by Abu’l Barakat. It’s here: Abu l-Barakat’s Catalog (trans)
I’m placing this file and its contents in the public domain. Please do whatever you like with it, for personal, professional, educational or commercial purposes. It’s free to use for any purpose. Adam also invites comments.
I intend to get an HTML version together as well, but this will take a day or so for me to do. Then I hope to make people in various email lists aware that it exists, and particularly classicists and patristics people, who might be interested to see what has made its way into Arabic.