“Hell!” he snapped irritably, as his foot touched a brick wall, “where the devil are you, constable?”

“Here beside you, sir,” answered P.C. Bryce, of K Division, his guide.

“Which side?”

“Here, sir.”

The constable grasped Kerry’s arm.

“But we’ve walked slap into a damn brick wall!”

“Keep the wall on your left, sir, and it’s all clear ahead.”

“Clear be damned!” said Kerry. “Are we nearly there?”

“About a dozen paces and we shall see the lamp—if it’s been lighted.”

“And if not we shall stroll into the river, I suppose?”