He saw the car with the little green light which Oberzohn invariably used to mark his machines from others, and, climbing into the cab (as it was), sat down to recover his breath. The driver he knew as one of the three men employed by Oberzohn, one of whom Mr. Washington had seen that morning. The journey back to town was a long one, though the machine, for a public vehicle, was faster than most. Gurther welcomed the ride. Once more he had failed, and he reasoned that this last failure was the most serious of all. The question of Oberzohn’s displeasure did not really arise. He had travelled far beyond the point when the Swede’s disapproval meant very much to him. But there might be a consequence more serious than any. He knew well with what instructions Pfeiffer had been primed on the night of the attack at Rath House—only Gurther had been quicker, and his snake had bitten first. Dr. Oberzohn had no illusions as to what had happened, and if he had tactfully refrained from making reference to the matter, he had his purpose and reasons. And this night journey with Elijah Washington was one of them. There was no excuse; he had none to offer. His hand wandered beneath the dress to the long knife that was strapped to his side, and the touch of the worn handle was very reassuring. For the time being he was safe; until another man was found to take Pfeiffer’s place Oberzohn was working single-handed and could not afford to dispense with the services of this, the last of his assassins. It was past eleven when he dismissed the taxi at the end of the long lane, and, following the only safe path, came to the unpainted door that gave admission to Oberzohn’s property. And the first words of his master told him that there was no necessity for explanation. “So you did not get him, Gurther?” “No, Herr Doktor.” “I should not have sent you.” Oberzohn’s voice was extraordinarily mild in all the circumstances. “That man you cannot kill—with the snake. I have learned since you went that he was bitten at the blind man’s house, yet lives! That is extraordinary. I would give a lot of money to test his blood. You tried the knife?” “Ja, Herr Doktor.” He lifted his veil, stripped off hat and wig in one motion. The rouged and powdered face was bruised; from under the brown wig was a trickle of dried blood. “Good! You have done as well as you could. Go to your room, Gurther—march!” Gurther went upstairs and for a quarter of an hour was staring at his grinning face in the glass, as with cream and soiled towel he removed his make-up.