One of the black robed clerics set down a map on the table between the gathered adventurers, drawing attention to it.  "The orcs always seem to have eight sentries on duty at any time; getting past them during the day will take the grace of mercury.  The stables usually have reinforcements as well, though in our last revelations, the orcs brought an incredibly large creature inside under cover of darkness.  ...It's probably hungry by now.  Hail Jupiter."  The cleric said in a hushed tone, summarizing what their magical investigations had already uncovered.  "I think the orcs are looking for prisoners to fight a battle against their new monster in the arena.  Such brutality is the way of their unclean kind."