'Me knew this not,' Marvin said. 'And yet, the Grey Knights have ever been friends to learning and companions to piety, and most especially they have espoused 'gainst royal opposition, the cause of d'Augustin.'

'True, most extremely true,' the miserable Gules said, his weakly handsome features twisted into a grimace of agony. 'And so I too believed. But then last day yesterweek I learned that our Grand Master Helvetius had passed away-'

'Due to a bit of steel in the liver,' Blackamoor said.

'-and that I was now bound to the new Grand Master, as utterly and completely as ever, since our vows are to the Office, not the man.'

'And that new Master?' Marvin asked.

'Happens to be myself!' cried Blackamoor. And now Marvin saw upon his finger the great signet ring of the Order.

'Yes, so it did befall,' Blackamoor said, the left side of his mouth twisting cynically. 'I appropriated that ancient office, since it was an instrument well suited to my hand and sensible to my usages. And so I am Master, and sole arbiter of Polity and Decision-Making, responsible to no power save that of Hell itself, and answerable to no voice save that which echoes from the nethermost crevices of mine own soul!'

There was something magnificent about Blackamoor at that moment. Detestable and cruel though he was, reactionary and self-involved, luxuriating and careless of others, yet still withal, here was a man. So Marvin thought, with grudging respect. And his mouth hardened into fighting lines as he turned to face his antagonist.

'And now,' Blackamoor said, 'our principals are upon the stage, and we lack but one actor to fulfill our drama and bring it to a meet concludence. And this, our last performer, has long and patiently waited in the wings, observing yet unobserved, watching the convolutions of our situation and awaiting his cue to bring him on for his brief moment of glory … But soft, he comes!'

There was a sound of heavy footsteps in the corridor. Those within the room listened and waited, shuffling uneasily. Slowly the door swung open-

And there entered a masked man, clad in black from tip to toe, and carrying over his shoulder a great double-edged axe. He stood poised in the doorway as though unsure of his welcome.

'Goodday to you, executioner,' Blackamoor drawled. 'Now all is complete, and the final moments of this farce can be performed. Forward, guards!'

The guards closed in the locked sword-mattocks. They seized Marvin and gripped him fast, bending his head forward with neck exposed.

'Executioner!' cried Blackamoor. 'Perform your duty!'

The executioner stepped forward and tested the edges of his great axe. He drew the weapon high over his head, stood poised for a moment, then began his downward swing.

And Cathy screamed!

She threw herself upon that grim masked figure, clawing at him, deflecting his heavy axe, which clashed against the granite floor and drew a shower of sparks. The axeman pushed her angrily away, but her fingers had closed around the black silk of his mask.

The executioner roared as he felt the mask being torn away. With a cry of dismay he tried to cover his features. But all in that dungeon room had seen him clear.

Marvin was at first unable to believe the testimony of his senses. For, beneath that mask, he looked into a face that seemed somehow familiar. Where had he gazed upon that line of cheek and brow, those brown eyes with their faint tilt, that firm jaw?

Then he remembered; he had seen it, long ago, in a mirror.

The executioner was wearing his face, and walking in his body …

'Ze Kraggash!' Marvin said.

'At your service.' And the man who had stolen Marvin's body bowed mockingly, and grinned at Marvin with his own face.

Chapter 30

Lord Blackamoor was first to break tableau. With skilled fingers he swept off his cap and wig. Loosening his collar, he probed along his neck, unfastening several invisible holders. Then, with a single movement, he peeled the tight-fitting skin-mask from his face.

'Detective Urdorf!' Marvin cried.

'Yes, it is I,' the Martian detective said. 'I am sorry we had to put you through this, Marvin; but it was our best opportunity of bringing your case to a quick and successful conclusion. My colleagues and I decided-'

'Colleagues?' Marvin asked.

'I forgot to make the introductions,' Detective Urdorf said, grinning wryly. 'Marvin, I would like you to meet Lieutenant Ourie and Sergeant Fraff.'

The two who had masqueraded as Lord Inglenook and Sir Gules now swept off their skin-masks and revealed themselves in the uniforms of the North-west Galactic Interstellar Constabulary. They grinned good-naturedly as they shook Marvin's hand.

'And these gentlemen,' Urdorf said, gesturing at the Thuringian guards, 'have also aided us considerably.'

The guards removed their deal-coloured half-jackets of buff, and stood revealed in the orange uniforms of Cassem City Traffic Patrolmen.

Marvin turned to Cathy. She had already pinned to her bodice the red and blue badge of a special agent in the Interplanetary Vigilance Association.

'I – I think I understand,' Marvin said.

'It's really simple enough,' Detective Urdorf said. 'In working on your case, I had, as is usual, the aid and cooperation of various other law enforcement agencies. Upon three separate occasions we came close to capturing our man; but always he evaded us. This might have gone on indefinitely had we not tried this scheme of entrapment. The theory was sound; for if Kraggash could succeed in destroying you, he could claim your body as his own without fear of a counter-claimant. Whereas, as long as you were alive, you would continue to search for him.

'Thus, we enticed you into our scheme, hoping that Kraggash would take notice, and would enter the plan himself so as to be sure of destroying you. The rest is history.'

Turning to the unfrocked executioner, Detective Urdorf said, 'Kraggash, have you anything to add?'

The thief with Marvin's face lounged gracefully against the wall, his arms folded and his body replete with composure.

'I might hazard a comment or two,' Kraggash said. 'First, let me point out that your scheme was clumsy and transparent. I believed it to be a hoax from the start, and entered it only on the distant possibility of its being true. Therefore, I am not surprised at this outcome.'

'An amusing rationalization,' Urdorf said.

Kraggash shrugged. 'Secondly, I want to tell you that I feel no moral compunction in the slightest at my so-called crime. If a man cannot retain control of his own body, then he deserves to lose it. I have observed, during a long and varied lifetime, that men will give their bodies to any rogue who asks, and will enslave their minds to the first voice that commands them to obey. This is why the vast majority of men cannot keep even their natural birthright of a mind and body, but choose instead to rid themselves of those embarrassing emblems of freedom.'

'That,' Detective Urdorf said, 'is the classic apologia of the criminal.'

'That which you call a crime when one man does it,' Kraggash said, 'you call government when many men do it. Personally, I fail to see the distinction; and failing to see it, I refuse to live by it.'

'We could stand here all year splitting words,' Detective Urdorf said. 'But I do not have time for such recreation. Try your arguments on the prison chaplain, Kraggash. I hereby arrest you for illegal Mindswapping, attempted murder, and grand larceny. Thus I solve my 159th case and break my chain of bad luck.'

'Indeed?' Kraggash said coolly. 'Did you really think it would be so simple? Or did you consider the possibility that the fox might have another lair?'

'Take him!' Urdorf shouted. The four policemen moved swiftly towards Kraggash. But even as they moved, the criminal raised his hand and drew a swift circle in the air.