He turned the string over and over, examining the three knots set at inch intervals in the middle of its length. They were large and asymmetrical and seemed to serve no discernible purpose except, perhaps, to infatuate minds like his own. How else to explain their cunning construction except that the knotter had been at pains to create a problem that was well nigh insoluble? He let his fingers play over the surfaces of the knots, instinctively seeking some latitude, but they had been so brilliantly contrived that no needle, however fine, could have been pushed between the intersected strands. The challenge they presented was too appealing to ignore. Again he glanced up at the old man. Brendan had apparently tired of his labors. As Karney looked on he threw the old man against the tunnel wall and let the body sink to the ground. Once there, he let it lie. An unmistakable sewer stench rose from it.

"That was good," Brendan pronounced like a man who had stepped from an invigorating shower. The exercise had raised a sheen of sweat on his ruddy features; he was smiling from ear to ear. "Give me some of that vodka, Catso."

"All gone," Catso slurred, upending the bottle. "Wasn't more than a throatful in it."

"You're a lying shit," Brendan told him, still grinning.

"What if I am?" Catso replied, and tossed the empty bottle away. It smashed. "Help me up," he requested of Brendan. The latter, his great good humor intact, helped Catso to his feet. Red had already started to walk out of the tunnel; the others followed.

"Hey Karney," Catso said over his shoulder, "you coming?"

"Sure."

"You want to kiss the dog better?" Brendan suggested. Catso was almost sick with laughter at the remark. Karney made no answer. He stood up, his eyes glued to the inert figure slumped on the tunnel floor, watching for a flicker of consciousness.