Orme guided the boat a little further out into the stream. They were going downriver again, back towards the station at Wapping where they were headquartered. Six weeks ago Inspector Durban had been commander and Monk had been a private agent of enquiry. Monk still could not think of it without a tightening of the throat-a loneliness and a guilt he could not imagine would ever leave him. Each time he saw a group of River Police and one of them walked slowly with a smooth, ambling stride, a little rounded at the shoulder, he expected him to turn and he would see Durban 's face. Then memory came back, and he knew it could not be.

The bridge was only two hundred feet away now. The couple were still there against the balustrade. The man held her by the shoulders as if he would take her in his arms. Perhaps they were lovers. Of course, Monk could not hear their words-the wind tore them from the couple's mouths-but their faces were alive with a passion that was clearer with every moment as the boat drew towards them. Monk wondered what it was: a quarrel, a last farewell, even both?

The police oarsmen were having to pull hard against the incoming tide.

Monk looked up again just in time to see the man struggling with the woman, holding her fiercely as she clung to him. Her back was to the railing, bending too far. Instinctively he wanted to call out. A few inches more and she would fall!

Orme, too, was staring up at them now.

The man grasped at the woman and she pulled away. She seemed to lose her balance and he lunged after her. Clasped together, they teetered for a desperate moment on the edge, then she pitched backwards. He made a wild attempt to catch her. She flung out a hand and gripped him. But it was too late. They both plunged over the side and spun crazily, like a huge, broken-winged bird, until they hit the racing, filthy water and were carried on top of it, not even struggling, while it soaked into them, dragging them down.