We boarded a barge for the short row back to the Palace wharf.
"I've just had an interesting conversation with the concubine of the Parthian ambassador," Julia said.
"He didn't bring his wife, I take it?" I said.
"No. Wives and children must be left behind in Parthia against the ambassador's good behavior."
"The poor man. And what did this consolationary female have to say?"
"By great good luck she is a highly educated Greek hetaira. The ambassador's Greek is deficient, and she helps him with documents written in that language. Most of it is the usual tedious embassy business, but recently she read for him certain illustrated documents which he translated into Parthian. He sent the originals and translation to King Phraates in a locked chest under heavy guard."
I felt the familiar tingling, the one I always get when an important bit of the puzzle clicks into place. "And the nature of these documents?"
"They were plans for war machines. She could make nothing of the drawings, and most of the text was in technical language she wasn't familiar with, but there was some sort of device for setting fire to ships, and others for breaching walls and hurling missiles. There was also a receipt for a large sum of money in payment for these plans. The money was paid to Iphicrates of Chios. She thought it a great coincidence that he was murdered so soon after."
"Remind me never to entrust my secrets to a talkative Greek woman. Did she recall anything else?"
"This came out in the middle of a great gush of words concerning all the details of her life. I thought it would be unwise to press her about it. Easterners never listen to women, and she was dying for somebody to talk to." This, as it turned out, was an unfortunate choice of words.
Chapter VI
"The man's name is Eunos," Amphytrion said. "He is from Rhodes and was personal valet to Iphicrates for two years."
"Can he read?" I asked.
"Of course. All the Museum slaves assigned to personal service must meet certain standards of education. After all, if one must send a slave from a lecture hall to fetch a certain book, he must be able to recognize it."
"Sensible," I said. "Tell me, do you know whether the General Achillas or any other of the military nobles paid frequent visits to Iphicrates?"
He looked at me as if I had taken leave of my senses. "Meaning no disrespect to his Majesty's noble servants, the military men are an ignorant lot of Macedonian mountain bumpkins. Why would they consort with a scholar like Iphicrates?"
"Was Iphicrates ever absent for extended periods?" I asked.
"Why, yes. He took monthly trips by boat upon the river, taking measurements of the water's rise and fall and observing the effects of flowing water upon the banks. He was deeply interested in the dynamics of water. You saw the canal lock he was designing."
"Yes, I did. What was the duration of these trips?"
"I fail to see the pertinence of these questions, but he always took six days at the beginning of each month for these journeys."
"Is that a common sort of arrangement here?" I asked.
"Within reasonable limits, our scholars have perfect freedom to pursue their studies as they see fit. They need not even give lectures if they do not wish to. Here in the Museum, our goal is pure knowledge."
"Most commendable," I murmured. I was beginning to have severe doubts concerning the purity of Iphicrates's knowledge. There was a knock at the door and a middle-aged Greek entered, dressed in the livery tunic of the Museum. He bowed to Amphytrion and to me, then waited with that dignified self-possession common to slaves conscious of their own superiority in slave society.
"Eunos, the Senator wishes to question you concerning the late Iphicrates of Chios."
"Eunos," I began, "did you attend Iphicrates on the night of his murder?"
"Yes, Senator. I helped him prepare to go to the banquet that night, then he dismissed me. As I was walking down the gallery toward my quarters, he called me back and told me to bring some extra lamps. I did as he directed and set the lamps in his study. I was about to light them, but he dismissed me and I left."
"Had you any indication why extra lamps were required when he was about to attend a banquet?"
"He had a visitor. I had not heard the man arrive."
"Did you get a look at him?" I asked.
"When I came in with the lamps, the man was sitting in the bedroom to the rear. The light was dim. He seemed to be medium-sized, with dark hair and beard trimmed in the Greek fashion. He did not look my way. That was all I saw."
"Do you remember anything else that might help to identify, this stranger? Anything else Iphicrates might have done that was unusual?"
"I am sorry, sir. No, there was nothing else." I dismissed him and sat pondering for a while. It didn't surprise me that the man had not come forth earlier. Any intelligent slave knows better than to volunteer information unless asked. Amphytrion had less excuse for not asking, but that was understandable, too. It would have been beneath his philosophical dignity to listen to a slave.
"I would like another look at Iphicrates's quarters," I told Amphytrion as I rose from my chair.
"Be my guest, Senator, but we must remove Iphicrates's belongings soon. The distinguished scholar of music, Zenodotos of Pergamum, is to arrive soon and we shall need those rooms."
I found Asklepiodes finishing up an anatomy lesson and persuaded him to accompany me. We found the study in good order, the completed inventory arranged neatly on the large table. I picked up one of the silver bowls.
"You said that Iphicrates was doing research into the properties of parabolic mirrors," I said. "Just what are the properties of these things, besides concentrating light?"
"They also concentrate heat," Asklepiodes said. "Come, I'll demonstrate." We went out into the courtyard and he squinted at the angle of the sun. With the reflector, he cast a disc of light against the side of the now-abandoned canal lock. Then he drew it back. As he did so, the disc shrank until it was an intensely bright spot the size of a copper as. "Put your hand there and you will see what I mean."
Gingerly, I slid my hand along the wooden surface until the tiny disc of light rested in my palm. It felt distinctly warm, but not hot enough to be distressing.
"To what use did Archimedes put these devices?" I asked.
"It is said that he set fire to Roman ships with them."
"Do you think that is possible? It doesn't seem to make all that much heat."
"These are miniatures. The ones Archimedes used would have been larger than shields. And he used a great many, perhaps a hundred of them lined up atop the harbor walls of Syracuse. With that many concentrating their light, I believe they might well have succeeded in firing attacking ships. Ships are extremely combustible at the best of times."
So for a while we experimented with the four silver bowls. With the light of all four concentrated on a single spot, we managed to coax some faint wisps of smoke from the wood. Back inside, I went over the inventory lists, trying to find anything that might offer a clue to just what the infuriating pedant had been up to.
"Item: a box of miscellaneous rope samples, each sample labeled," I read. "What do you think that means?" So we rooted around until we found the box beneath the table. It contained scores of pieces of rope, variously twisted and braided and of various materials, both animal and vegetable fibers being used. Each sample was about a foot long, and from each dangled a papyrus label adorned with shorthand lettering and strings of numerals.