They descended to the first floor of the round turret. Though the most ancient door of the White Tower was situated in the opposite corner, along the Inmost Ward, a more recent one was available at the base of the turret stair. It deposited them upon a strip of green on the north side, between the White Tower and a row of storehouses that lined the inner surface of the curtain wall. Here Jack broke his stride for a moment, because the storehouses were as regular as shocks of grain in a field-row, and offered no points of reference by which he could establish his bearings. But raising his sights above their saw-toothed roof-line he saw the slotted parapets of three bastions behind them. Here, the fire that still burned in the Tower hamlets north of the moat came in useful, as very little light was now left in the sky. But the red fire-glow shone crisply through the crenellations on those bastions. Being now a dungeon o’ learning where the Tower was concerned, he knew that these three were, from left to right, Bowyer, Brick, and Jewel Towers.