Just then the view lit up and the bristles along Pupsie's back suddenly stood on end. The scene in the viewplate was familiar. Six ratcatchers were lined up, one behind another, with the foremost pointing the Colt at his own midriff. Through the adjoining wall, which was transparent on the viewplate, a man in the uniform of the chief rat of the ratcatchers, was visible holding his fingers in his ears and with a terrified and painful expression on his face.



The blonde woman jumped when the bang sounded and the six ratcatchers reeled and then collapsed. The chief beyond the wall looked a trifle relieved to find himself still alive, but Zitts snorted with audible disgust.

"Bunglers!" Zitts growled, then looked at Pupsie. "That weapon, Pupsie," he said. "Get a good whiff of it."

The huge nostrils flared and sniffed in a way that stirred a strong breeze in the room and sent prickles along the blonde woman's spine. Then Pupsie looked up and winked.

"Now trace it to the murderer," Zitts ordered.

Pupsie gathered himself for a leap at the chief rat, but Zoo sprang between him and the viewplate and shut off the machine.

"No, no," Zitts cautioned. "His smell is on the weapon, of course. But he merely examined it. Use your head now and tune in the machine yourself and find the murderer."