He had left Blue Gate an hour and more when Musky Mag emerged from her black stairway, peering fearfully about the street ere she ventured her foot over the step. So she stood for a few seconds, and then, as one chancing a great risk, stepped boldly on the pavement, and, turning her back to the Highway, walked toward Back Lane. This was the nearer end of Blue Gate, and, the corner turned, she stopped short, and peeped back. Satisfied that she had no follower, she crossed Back Lane, and taking every corner, as she came to it, with a like precaution, threaded the maze of small, ill-lighted streets that lay in the angle between the great Rope Walk and Commercial Road. This wide road she crossed, and then entered the dark streets beyond, in rear of the George Tavern; and so, keeping to obscure parallel ways, sometimes emerging into the glare of the main road, more commonly slinking in its darker purlieus, but never out of touch with it, she travelled east; following in the main the later course of the limy man, who had left Blue Gate by its opposite end. The fog, that had dulled the lights in Ratcliff Highway, met her again near Limehouse Basin; but, ere she reached the church, she was clear of it once more. Beyond, the shops grew few, and the lights fewer. For a little while decent houses lined the way: the houses of those last merchants who had no shame to live near the docks and the works that brought their money. At last, amid a cluster of taverns and shops that were all for the sea and them that lived on it, the East India Dock gates stood dim and tall, flanked by vast raking walls, so that one might suppose a Chinese city to seethe within. And away to the left, the dark road that the wall overshadowed was lined on the other side by hedge and ditch, with meadows and fields beyond, that were now no more than a vast murky gulf; so that no stranger peering over the hedge could have guessed aright if he looked on land or on water, or on mere black vacancy. Here the woman made a last twist: turning down a side street, and coming to a moment's stand in an archway. This done, she passed through the arch into a path before a row of ill-kept cottages; and so gained the marshy field behind the Accident Hospital, the beginning of the waste called The Cop.