It was then, after saying good-bye, and good-bye again as she drove away, that she gave way to a feeling of unrest. She drove slowly to Baker Street station, but by that time she was thinking of Mr. Cromartie. This caused her, almost mechanically, to swing her car round to the left, and shortly afterwards to take the Outer Circle. As she drove, her mind was almost blank; she was driving in that direction merely to dissipate a mood. All she was conscious of was that Cromartie was there--in the Zoo. She was tired, and driving distracted her. In a few moments she was passing the Gardens. She pulled up just over the tunnel, before reaching the main entrance. At this point she was as close as she could get to the new Ape-house, which lay, as she knew, under the shadow of the Mappin Terraces. She got out of the car and walked up to the palings. They were too high for her to look over, and when she pulled herself up by her hands there was nothing to be seen but the black shadows of evergreens and, through one break in them, a corner of the Mappin Terraces--a silhouette of black against the moonlight. As she looked it came into her head that it was like something familiar to her. Her wrists ached and she jumped down. “John, John, why are you in there?” she said aloud. In a few moments she saw a policeman approaching her, so she got back into her car and drove on slowly. As she passed the main entrance she turned again, and again she saw the Mappin Terraces. “The Tower of Babel, of course,” she said aloud, “in Chambers’s Encyclopedia. It’s like Noah’s Ark, too, I suppose, as it’s a menagerie, and--Oh, curse! Oh, damn!” There were tears in her eyes, and the street lamps had become little circular rainbows. But what she said to herself was that it was awkward driving.