Beyond that was Tower Hill, an open glacis between the buildings of London and the moat of the Tower. It was put to diverse uses, viz. site of public decapitations, place for drilling of troops, and picnic-ground. Some ventured to name it a green. Today it was wholly brown, but enlivened by stripes of red. The garrison of the Tower used it as a place to rehearse their tedious drills and maneuvers. This explained why it was brown, for the grass had not been able to maintain a grip on the pounded mud. The troops were drilling at this very moment, which explained the red stripes; for the Queen’s Own Black Torrent Guard, despite their name, wore red coats. They were grouped by company, which made it easy to number them even without aid of a spyglass. Indeed their orderly battle-lines looked like nothing so much as tally-marks scratched in red chalk on a clay tile.