Charles White was riding atop the black wagon, which was surrounded by cloaked out-riders—mounted Messengers—and followed by a troop of soldiers on foot: two platoons of the Queen’s Own Black Torrent Guards, who garrisoned the Tower, and who (or so Daniel gathered) were in the unenviable position of being at the beck and call of Charles White, whenever he wanted reinforcements. The black wagon itself was now padlocked from the outside .