“I thought you wanted me to reserve passage.”

“I do. For Haxo Angmark. Hell be returning to Polypolis in the brig.”

“Well, well,” said Rolver. “So you’ve picked him out.”

“Of course,” said Thissell. “Haven’t you?”

Rolver shrugged. “He’s either Welibus or Kershaul, that’s as close as I can make it. So long as he wears his mask and calls himself either Welibus or Kershaul, it means nothing to me.”

“It means a great deal to me,” said Thissell. “What time tomorrow does the lighter go up?”

“Eleven twenty-two sharp. If Haxo Angmark’s leaving, tell him to be on time.”

“He’ll be here,” said Thissell.

He made his usual call upon Welibus and Kershaul, then returning to his houseboat, put three final marks on his chart.

The evidence was here, plain and convincing. Not absolutely incontrovertible evidence, but enough to warrant a definite move. He checked over his gun. Tomorrow, the day of decision. He could afford no errors.

The day dawned bright white, the sky like the inside of an oyster shell; Mireille rose through iridescent mists. Toby and Rex sculled the houseboat to the dock. The remaining three out-world houseboats floated somnolently on the slow swells.

One boat Thissell watched in particular, that whose owner Haxo Angmark had killed and dropped into the harbor. This boat presently moved toward the shore, and Haxo Angmark himself stood on the front deck, wearing a mask Thissell had never seen before: a construction of scarlet feathers, black glass and spiked green hair.

Thissell was forced to admire his poise. A clever scheme, cleverly planned and executed — but marred by an insurmountable difficulty.

Angmark returned within. The houseboat reached the dock. Slaves flung out mooring lines, lowered the gang-plank. Thissell, his gun ready in the pocket flap of his robes, walked down the dock, went aboard. He pushed open the door to the saloon. The man at the table raised his red, black and green mask in surprise.

Thissell said, “Angmark, please don’t argue or make any — ”

Something hard and heavy tackled him from behind; he was flung to the floor, his gun wrested expertly away.

Behind him the hymerkin clattered; a voice sang, “Bind the fool’s arms.”

The man sitting at the table rose to his feet, removed the red, black and green mask to reveal the black cloth of a slave. Thissell twisted his head. Over him stood Haxo Angmark, wearing a mask Thissell recognized as a Dragon Tamer, fabricated from black metal, with a knife-blade nose, socketed eyelids and three crests running back over the scalp.

The mask’s expression was unreadable, but Angmark’s voice was triumphant. “I trapped you very easily.”

“So you did,” said Thissell. The slave finished knotting his wrists together. A clatter of Angmark’s hymerkin sent him away. “Get to your feet,” said Angmark. “Sit in that chair.”

“What are we waiting for?” inquired Thissell.

“Two of our fellows still remain out on the water. We won’t need them for what I have in mind.”

“Which is?”

“You’ll learn in due course,” said Angmark. “We have an hour or so on our hands.”

Thissell tested his bonds. They were undoubtedly secure.

Angmark seated himself. “How did you fix on me? I admit to being curious. . Come, come,” he chided as Thissell sat silently. “Can’t you recognize that I have defeated you? Don’t make affairs unpleasant for yourself.”

Thissell shrugged. “I operated on a basic principle. A man can mask his face, but he can’t mask his personality.”

“Aha,” said Angmark. “Interesting. Proceed.”

“I borrowed a slave from you and the other two out-worlders, and I questioned them carefully. What masks had their masters worn during the month before your arrival? I prepared a chart and plotted their responses. Rolver wore the Tarn Bird about eighty percent of the time, the remaining twenty percent divided between the Sophist Abstraction and the Black Intricate. Welibus had a taste for the heroes of Kan Dachan Cycle. He wore the Chalekun, the Prince Intrepid, the Seavain most of the time: six days out of eight. The other two days he wore his South Wind or his Gay Companion. Kershaul, more conservative, preferred the Cave Owl, the Star Wanderer, and two or three other masks he wore at odd intervals.

“As I say, I acquired this information from possibly its most accurate source, the slaves. My next step was to keep watch upon the three of you. Every day I noted what masks you wore and compared it with my chart. Rolver wore his Tarn Bird six times, his Black Intricate twice. Kershaul wore his Cave Owl five times, his Star Wanderer once, his Quincunx once and his Ideal of Perfection once. Welibus wore the Emerald Mountain twice, the Triple Phoenix three times, the Prince Intrepid once and the Shark God twice.”

Angmark nodded thoughtfully. “I see my error. I selected from Welibus’ masks, but to my own taste — and as you point out, I revealed myself. But only to you.” He rose and went to the window. “Kershaul and Rolver are now coming ashore; they’ll soon be past and about their business — though I doubt if they’d interfere in any case; they’ve both become good Sirenese.”

Thissell waited in silence. Ten minutes passed. Then Angmark reached to a shelf and picked up a knife. He looked at Thissell. “Stand up.”

Thissell slowly rose to his feet. Angmark approached from the side, reached out, lifted the Moon Moth from Thissell’s head. Thissell gasped and made a vain attempt to seize it. Too late; his face was bare and naked.

Angmark turned away, removed his own mask, donned the Moon Moth. He struck a call on his hymerkin. Two slaves entered, stopped in shock at the sight of Thissell.

Angmark played a brisk tattoo, sang, “Carry this man up to the dock.”

“Angmark!” cried Thissell. “I’m maskless!”

The slaves seized him and in spite of Thissell’s desperate struggles, conveyed him out on the dock, along the float and up on the dock.

Angmark fixed a rope around Thissell’s neck. He said, “You are now Haxo Angmark, and I am Edwer Thissell. Welibus is dead, you shall soon be dead. I can handle your job without difficulty. I’ll play musical instruments like a Night-man and sing like a crow. I’ll wear the Moon Moth till it rots and then I’ll get another. The report will go to Polypolis, Haxo Angmark is dead. Everything will be serene.”

Thissell barely heard. “You can’t do this,” he whispered. “My mask, my face…” A large woman in a blue and pink flower mask walked down the dock. She saw Thissell and emitted a piercing shriek, flung herself prone on the dock.

“Come along,” said Angmark brightly. He tugged at the rope, and so pulled Thissell down the dock. A man in a Pirate Captain mask coming up from his houseboat stood rigid in amazement.

Angmark played the zachinko and sang, “Behold the notorious criminal Haxo Angmark. Through all the outer-worlds his name is reviled; now he is captured and led in shame to his death. Behold Haxo Angmark!”

They turned into the esplanade. A child screamed in fright; a man called hoarsely. Thissell stumbled; tears tumbled from his eyes; he could see only disorganized shapes and colors. Angmark’s voice belled out richly: “Everyone behold, the criminal of the out-worlds, Haxo Angmark! Approach and observe his execution!”

Thissell feebly cried out, “I’m not Angmark; I’m Edwer Thissell; he’s Angmark.” But no one listened to him; there were only cries of dismay, shock, disgust at the sight of his face. He called to Angmark, “Give me my mask, a slave-cloth. . ”

Angmark sang jubilantly, “In shame he lived, in maskless shame he dies.”

A Forest Goblin stood before Angmark. “Moon Moth, we meet once more.”

Angmark sang, “Stand aside, friend Goblin; I must execute this criminal. In shame he lived, in shame he dies!”

A crowd had formed around the group; masks stared in morbid titillation at Thissell.