I just found a very interesting article by Stephen Carlson on Clement's list on the order of the Gospels in Clement over at Mark Goodacre's NT Gateway: "Clement of Alexandria's 'Order' of the Gospels." The article originally appeared in New Testament Studies 47 (2001): 118-25.
I find his analysis facinating. Anybody else want to read the article and comment on it?
In brief, Clement seems to break with the rest of the early Church in saying that Matthew and Luke were "written first". What is especially surprising is that Origen--a student of Clement--takes the "Augustinian" view (i.e., that the canonical order was the historical order, Matthew, Mark, Luke and then John)? How do we account for the divergence here?
Read the article and let me know what you think...
You might also check out Carlson's excellent blog, Hypotyposeis.