Mikael Parsons, author of a many interesting and important books, one-time visiting fellow at Tyndale House, long-time follower of this blog and NT Prof at Baylor, requests some help: "I wonder if you would mind posting a request for bibliography discussing illuminated manuscripts that depict scenes in Acts (and I'd be grateful specifically for some bib on the Rabbula ms.)"
Here is the background: "Heidi and I are working (slowly) on the Blackwells commentary on Acts; at the moment we are looking into Acts in the history of Art. I think the earliest image of Pentecost is to be found in the Rabbula Gospels (here in Florence, where we are at the moment).
It also contains an early (but not the earliest) image of the ascension:
and one of the few illustrations of the selection of Matthias."
So, go to it.