"I had thought, after so many years… And then, when they told me your name, how could I know for sure that it was the same Gordianus whom I had known so long ago? To be sure, the name is unusual, and also they seemed to think that you had been to Alexandria as a young man, and what they said of you sounded like the tree that would have grown from the sapling-this expression you have also, yes? And I have used the correct tenses? Good. Still, with so much danger around me, so many betrayals-you understand why I could not come to you openly? Why I hesitated to reveal myself to you? Why I had to be suspicious even of your very fine wine?" He looked at me uneasily and chewed a fingernail. "Even when I saw you, I was not quite sure that you were the Gordianus I had known in Alexandria. Time changes us all, and you wear a sort of disguise as well, you know."

He gestured to something on my face. I touched my chin and realized that he meant my beard.

I smiled. "Yes, I was clean-shaven back then. Alexandria is too hot for beards, and I was too young to grow a decent one anyway. Or do you mean all the gray among the black? Gray hair and wrinkles are a kind of involuntary disguise, I suppose, worn by anyone who lives long enough."

Dio nodded and studied my face, still trying to decide whether he could trust me. "I have to be very careful," he said.

"Yes, I know something about your situation," I said. "Your journey from Alexandria, the attacks on your entourage after you landed down in Neapolis, the threats against you here in Rome, the fact that the Senate looks the other way. There's plenty of talk in the Forum these days about what people call 'the Egyptian situation.' "

"Still, how did you guess it was Dio?" asked the little gallus, pouring himself another cup of wine. "Our disguises got us safely through the streets. Granted, they may be less convincing at such close quarters-"

"Yes," said Dio, "how could you possibly have known it was me? Surely you didn't recognize my face, hidden in shadow and painted like a woman's, and after all these years. And surely it was not my voice, for I tried to speak like a woman and as little as I could, and you have not heard me speak for so long."

"Teacher, I'm not sure exactly why you've come to see me, but I assume it has something to do with the reputation I've made for myself: Finder, I'm called. I knew who you must be almost at once. If I couldn't figure out as small a thing as that, coming to see me would be a waste of your time."

"Elucidate," said Dio, in his expressionless teacher's voice.

"Yes, make yourself clear!" laughed the little gallus, lifting his wine cup and shaking out his bleached curls.

"Very well. That you were not what you wished to appear was immediately evident to me, as it was to Diana, and even to Belbo, my doorkeeper."

"What gave me away?" said Dio.

I shrugged. "Little things. Who can list all the differences between the ways that men and women walk and talk and hold themselves? An actor on the stage can convincingly portray a woman, but an actor trains for the task. To simply paint your face and put on a stola is hardly an impersonation."

"Then the pretense was not at all convincing? Be specific! I have to know, because if I cannot succeed with this disguise, then I must find another. It could mean the difference between-between life and…" He bit at his fingernails again, but finding nothing left to gnaw at, pulled nervously at the wrinkles that hung from his neck.

"Your fingernails gave you away, for a start. Roman matrons make a ritual of their manicures."

"Ah!" He looked at his nails with disgust. "A terrible habit. It's come back to me only since I arrived in Italy. I cannot seem to stop myself."

"You might grow back your nails, but your hands would still give you away. Such brown, weathered hands-no Roman matron has hands like yours, and neither does any citizen of standing. Only slaves and farmers have such hands-or visitors from foreign climes where the sun stays hot all year long and burns everyone brown as a nut, from King Ptolemy down to the lowest field slave."

"Ptolemy!" Dio spat the name.

"Yes, I saw your agitation earlier when I spoke his name, which gave further confirmation to what I already suspected: that Dio of Alexandria had come to pay me a visit."

"But you still haven't explained how you came to have such a suspicion in the first place," said the gallus. " 'Elucidate!' " he quipped, mimicking Dio.

"By steps, then: My visitor is dressed as a woman but is not a woman. My visitor must be a man, then, with a reason for concealing himself-I confess that I overlooked the possibility that either of you might be a eunuch. A man in trouble, perhaps in danger-that seemed likely from your nervous mannerisms and the fact that you refused any food, despite the fact that your stomach was growling. From your brown hands and your accent, I knew you must be foreign."

I shrugged. "But there's a point where explaining the discrete steps in a logical progression of thought becomes too tedious to bother with- would you agree, Teacher? Like asking a weaver to explain how a tapestry was made by taking it apart thread by thread-what a mess you'd have! Suffice it to say that given what I had already deduced, the supposition leaped to my mind that my visitor must be Dio of Alexandria. I've heard of your plight; rumor says that you've been hiding in private houses here on the Palatine Hill; suddenly it occurred to me that this foreign stranger with a desperate demeanor might be Dio. To test the possibility, I felt you out. I spoke of philosophy, my days in Alexandria, King Ptolemy. Your reactions confirmed my suspicions. This is not philosophy or mathematics, Teacher, but I think you must see how my mind works, and how I have put to use the ways of thinking which you taught me long ago."

Dio smiled and nodded. How curious, that in the fifth decade of my life I could still be warmed by the approval of a teacher I hadn't seen and had scarcely thought about for thirty years! "And what about Trygonion?" Dio said.

"Yes, what did you make of me?" asked the little gallus, his eyes sparkling. (I say 'his eyes,' though many people, perhaps most, would say 'her eyes'; as often as not, eunuchs are referred to as females, which seems to please them.)

"I confess, Trygonion, that you stumped me. I knew that you weren't what you pretended to be, but I got it wrong. I assumed you must be a young woman in a toga and hat, trying to pass herself off as a man."

The gallus threw back his head and let out a throaty laugh. "A logical balance, I suppose, for those who think of things as one or the other: a young woman in a toga, to match an old man in a stola!"

I nodded. "Exactly. The expectation of symmetry seduced me into error."

"So you took me for a woman!" said Trygonion, sitting low in his chair and fixing me with a feline gaze. "Who did you think such a woman might be-the philosopher's slave, his daughter, his wife?" He reached over and stroked the top of Dio's wrinkled hand with his fingertips; the philosopher made a face and drew back at the touch. "Or his Amazon bodyguard, perhaps?" Trygonion laughed.

I shrugged. "Your features and your voice confused me. Eunuchs are rare in Rome; I overlooked that possibility. I saw that you were unaccustomed to wearing a toga, as might be expected of a woman-but also of a foreigner. I did notice your accent, but it's faint, and not Egyptian; Phrygian, I assume, now that I know you're a gallus. Your Latin is almost that of a Roman. You must have lived here a long time."

"For ten years. I came to serve at the Great Mother's temple here in Rome when I was fifteen, the very year that I consecrated myself to her worship." By consecrated, Trygonion meant castrated; Dio winced. "So, the gallus proved a harder riddle to solve than the philosopher," the little priest said, looking pleased with himself.