Of that number, a quarter of them—one platoon—would normally be concentrated along the Wharf, which was by far the most vulnerable face of the complex in that anyone in the world could come up to it on a boat. The other three platoons would be scattered round the complex at a plethora of sentry-posts and guard-houses: at the gates, causeways, and drawbridges, of course, but also before the doors of the Yeoman Warders’ houses, in front of the Jewell Tower, and at diverse other check-points.