One of the key incidents, early in my WIP, is when there is a civil disturbance in Dover. One of the groups involved flees to Gloucester. The lord responsible for Dover is instructed by the King (in Gloucester) to punish his unruly subjects. The lord declines, raises an army, gets his sons (who are responsible for East Anglia, etc.) to raise their armies, and they march on the king in Gloucester. The king manages to get two other earls (Northumbria and Mercia) to raise their armies, and march to Gloucester to support him. My problem with all this is, what was the sequence of horses galloping across the country to carry the news of the incidents, and instructions to march, etc. such that they all met - coincidentally - at the same place?