"Whom am I to kill?" asked Kuurus.

"I do not know," said the man.

Kuurus looked at him angrily. Yet he had in the pockets of his belt twenty gold tarn disks, and of double weight. There must be more.

"All we know is this," said the man, handing him a greenish patch.

Kuurus studied the patch. "It is a faction patch," said he. "It speaks to me of the tarn races of Ar."

"It is true," said the man.

The faction patches are worn in Ar by those who favor a given faction in the racing. There are several such factions, who control the racing and compete among themselves, the greens, the reds, the golds, the yellows, the silvers.

"I shall go to Ar," said Kuurus.

"If you are successful," said the man, "return and you will receive a hundred such pieces of gold."

Kuurus looked at him. "If it is not true," he said, "you will die."

"It is true," said the man.

"Who is it," asked Kuurus, "that was slain? Who is it that I am to avenge?"

"A Warrior," said the man.

"His name?" asked Kuurus.

"Tarl Cabot," said the man.

Kuurus, of the Caste of Assassins, entered the great gate of Ar.

Guardsman did not detain him, for he wore on his forehead the mark of the black dagger.

Not for many years had the black tunic of the Assassins been seen within the walls of Ar, not since the siege of that city in 10,110 from its founding, in the days of Marlenus, who had been Ubar; of Pa-Kur, who had been Master of the Assassins; and of the Ko-ro-ban Warrior, in the songs called Tarl of Bristol.

For years the black of the Assassins had been outlawed in the city. Pa-Kur, who had been Master of the Assassins, had led a league of tributary cities to attack Imperial Ar in the time when its Home Stone had been stolen and its Ubar forced to flee. The city had fallen and Pa-Kur, though of low caste, had aspired to inherit the imperial mantle of Marlenus, had dared to lift his eyes to the throne of Empire and place about his neck the golden medallion of a Ubar, a thing forbidden to such as he in the myths of the Counter-Earth. Pa-Kur's horde had been defeated by an alliance of free cities, led by Ko-ro-ba and Thentis, under the command of Matthew Cabot of Ko-ro-ba, the father of Tarl of Bristol, and Kazrak of Port Kar, sword brother of the same Warrior. Tarl of Bristol himself on the windy height of Ar's Cylinder of Justice had defeated Pa-Kur, Master of the Assassins. From that time the black of the Assassins had not been seen in the streets of Glorious Ar.

Yet none would stand in the way of Kuurus for he wore on his forehead, small and fine, the sign of the black dagger.

When he of the Caste of Assassins has been paid his gold and has received his charge he affixes on his forehead that sign, that he may enter whatever city he pleases, that none may interfere with his work.

There are few men who have done great wrong or who have powerful, rich enemies who do not tremble upon learning that one has been brought to their city who wears the dagger.

Kuurus stepped between the great gates and looked about himself.

A woman carrying a market basket moved to one side, watching him, that she might not touch him, holding a child to her.

A peasant moved away that the shadow of the Assassin might not fall across his own.

Kuurus pointed to a fruit on a flat-topped wagon with wooden wheels, drawn by a small four-legged, horned tharlarion.

The peddler pressed the fruit into his hands and hurried on, not meeting his eyes.

Her back against the bricks of a tower near the gate, a slender, slim-ankled slave girl stood, watching him. Her eyes were frightened. Kuurus was apparently the first of the Caste of Assassins she had seen. Her hair was dark, and fell to the small of her back; her eyes were dark; she wore the briefly skirted, sleeveless slave livery common in the northern cities of Gor; the livery was yellow and split to the cord that served her as belt; about her throat she wore a matching collar, yellow enameled over steel.

Biting into the fruit, the juice running at the side of his mouth, Kuurus studied the girl. It seemed she would turn to leave but his eyes held her where she stood. He spit some seeds to the dust of the street within the gate. When he had finished he threw the core of the fruit to her feet and she looked down at it with horror. When she looked up, frightened, she felt his hand on her left arm.

He turned her about and thrust her down a side street, making her walk in front of him.

At a Paga Tavern, one near the great gate, cheap and crowded, dingy and smelling, a place frequented by strangers and small Merchants, the Assassin took the girl by the arm and thrust her within. Those in the tavern looked up from the low tables. There were three Musicians against one wall. They stopped playing. The slave girls in Pleasure Silk turned and stood stock still, the Paga flasks cradled over their right forearms. Not even the bells locked to their left ankles made a sound. Not a paga bowl was lifted nor a hand moved. The men looked at the Assassin, who regarded them, one by one. Men turned white under that gaze. Some fled from the tables, lest, unknown to themselves, it be they for whom this man wore the mark of the black dagger.

The Assassin turned to the man in a black apron, a fat, grimy man, who wore a soiled tunic of white and gold, stained with sweat and spilled paga.

"Collar," said the Assassin.

The man took a key from a line of hooks on the wall behind him.

"Seven," he said, throwing the Assassin the key.

The Assassin caught the key and taking the girl by the arm led her to a dark wall, in a low-ceilinged corner of the sloping room. She moved woodenly, as though numb. Her eyes seemed frightened.

There were one or two other girls there, kneeling, who drew back, with a sound of chain.

He thrust the dark-haired girl to her knees by the seventh collar and snapped it about her neck, turning the key, locking it. It gave her about a two-foot length of chain, fastened to a slave ring bolted into the stone. Then he looked down on her. Her eyes were lifted to his, frightened. The yellow of her livery seemed dark in the shadows. From where she knelt she could see the low-hanging tharlarion oil lamps of the main portion of the Paga tavern, the men, the girls in silk who, in a moment, belled, would move among them, replenishing the paga. In the center of the tables, under a hanging lamp, there was a square area, recessed, filled with sand, in which men might fight or girls dance. Beyond the area of the sand and the many tables there was a high wall, some twenty feet or so high, in which there were four levels, each containing seven small curtained alcoves, the entrances to which were circular, with a diameter of about twenty-four inches. Seven narrow ladders, each about eight inches in width, fixed into the wall, gave access to these alcoves.

She saw Kuurus go to the tables and sit cross-legged behind one, a table against the wall on her left, that there might be no tables behind him, but only the wall. The men who had been at that table, or near it, silently rose and left the area.

Kuurus had placed his spear against the wall behind him, and he had taken from his left shoulder his shield, his helmet and the sheathed short sword, which blade he had placed at his right hand on the low table.

At a gesture from the proprietor, the grimy man in the tunic of white and gold, one of the serving slaves, with a flash of ankle bells, hurried to the Assassin and set before him a bowl, which she trembling filled from the flask held over her right forearm. Then, with a furtive glance at the girl chained at the side of the room, the serving slave hurried away.

Kuurus took the paga bowl in both hands and put his head down, looking into it.