Well, We have the horns. And when a group is under a serious attack or needing help, it may call for help using th horn. I think that we can see waht is happening in the nearest groups, like pair 4 and 5 on the southern walls, to help each others if necessary...Am I right?
And the leader may use the horn one time, two, trhee or four, depending of the wall that is needing help. For example: one time - north/gatehouse, two times - east, trhee - south, four -west. Is it possible?
Right, my point is this. Why have two leaders? Is it so they both lead seperately? If so, what happens if they give conflicting orders? Tactical disaster. Ir is it so they can decide on strategy together? If so, what if they are not together to discuss strategy when something happens- no orders will be given at all!