Five minutes later Charnock passed through the square at a quick walk. Wilbraham was meditating a translation of the Carmen Sæculare, but business habits prevailed with him. He thrust the worn little Horace into his breast-pocket and followed Charnock at a safe distance. By means of a skill acquired by much practice, he walked very swiftly and yet retained the indifferent air of a loiterer. There was another picture of the tracker and the tracked to be seen that evening, but in Ronda instead of Tangier, and Charnock was unable to compare it with its companion picture, since, in this case, he was the tracked. The two men passed down the hill to the bridge. Charnock stopped for a little and stood looking over the parapet to the water two hundred and fifty feet below, which was just visible through the gathering darkness like a ridge of snow on black soil. Wilbraham halted at the end of the bridge. It seemed that Charnock was merely taking a stroll. He had himself, however, nothing better to do at the moment. He waited and repeated a stanza of his translation to the rhythm of the torrent, and was not displeased. Charnock moved on across the bridge, across the Plaza on the farther side of the bridge, up a street until he came to an old Moorish house that showed a blank yellow wall to the street and a heavy walnut door encrusted with copper nails. Then he stopped again and looked steadily at the house and for a long while. Wilbraham began pensively to whistle a slow tune under his breath. Charnock walked on, stopped again, looked back to the house, as though he searched for a glimpse of the lights. But there was no chink or cranny in that blank wall. The house faced the street, blind, dark, and repellent. Charnock suddenly retraced his steps. Wilbraham had just time to mount the doorsteps of a house as though he was about to knock, before Charnock passed him. Charnock had not noticed him. Wilbraham descended the steps and followed Charnock back into the Plaza. Charnock was looking for a road which he had seen that afternoon from Miranda's garden, a road which wound in zigzags down the cliff. The road descended from the Plaza, Charnock discovered it, walked down it; behind him at a little distance walked Wilbraham. It was now falling dark, but the night was still, so that Wilbraham was compelled to drop yet farther and farther behind, lest the sound of his footsteps upon the hard, dry ground should betray his pursuit. He fell so far behind, in fact, that he ceased to hear Charnock's footsteps at all. He accordingly hurried; he did more than hurry, he ran; he turned an angle of the road and immediately a man seated upon the bank by the road-side said:-- "_Buenas noches_." The man was Charnock. Wilbraham had the presence of mind not to stop.