Briony's done a good job of sorting things in his absence by order of priority. He'll need to go spend some time at the war table to familiarize himself with where everyone stands -- there have been movements, of course, after a few weeks -- which means that the bulk of what Cullen has to do is read and internalize information.

After a few hours he can't sit still any more; without looking up, he gets up and starts to pace, without diverting his attention from the report in front of him.