"An uprising by disaffected nobles, perhaps? I have heard rumors that some of the nomes are in arms and defying Alexandria."

"That's a job for infantry and cavalry," I said. "I've toured much of the land down to the first cataract. There are no fortifications to speak of. That part of Egypt is protected by the desert from foreign invasion. The only walled towns are up here in the delta area, and all of them are under Ptolemy's control."

"It seems, then, that you have good reasons for your suspicions. Now, what do you propose to do about them? Your superiors are not the sort of men to take hasty action."

"No, I have to gather more evidence. I have an utterly unjustified reputation as a troublemaker, and they'll look with skepticism on anything I bring them that isn't more concrete than what I already have."

"And how do you propose to assemble this information?"

"I think a bit of travel is called for."

I took my leave of Asklepiodes and went to the Library. The immense place was full of the dusty smell of books and the droning sound of scholars reading. Despite the size and massiveness of the building, the interior was not dim, abundant light being admitted by its extraordinarily large clerestory and numerous skylights of clearest glass. All the interior marble was white, to make best use of the admitted light. There were many statues of the various gods of learning: Apollo, Athena, ibis-headed Thoth and others, as well as busts of the great philosophers. The walls were lined up to the clerestory with lozenge-shaped cells holding scrolls like so many wine jars, each cell labeled with its contents.

By asking attendants, I was guided to the Wing of the Pergamese Books and found Eumenes of Eleusis overseeing the copying of some of his precious scrolls.

"May I help you, Senator?" he inquired politely.

"I hope that you may. The book that disappeared from the study of the late Iphicrates; you said it was by Biton, and entitled On Engines of War?"

"That is so."

"Might you have a copy?"

He nodded gravely. "Yes. We have copies made of every book that comes to the Library. This spares excessive handling of the more valuable originals."

"Yet Iphicrates insisted upon the original?"

"He was most insistent. He said that he did not wish to cope with the inevitable copier's errors."

"I see. Might I have a look at a copy?"

"Certainly, Senator." I followed him to a nook where scores of scrolls rested in their racks, labels dangling from their handles. He scanned the rack expertly and plucked a scroll from its resting place. It was a good deal smaller than the massive original I had seen in Iphicrates's study.

"Is it in a single volume?" I asked.

"Yes, it isn't a lengthy work. If you wish to peruse it, please unroll it carefully. It probably hasn't been looked into since it was made here nearly a century ago."

"How does the Museum happen to have the original, since it was dedicated to Attalus I of Pergamum? I would think it would be among the Pergamese collection." The rulers of Pergamum had founded a library in imitation of the Alexandrian, and in those days it still had a reputation second only to the original.

"An earlier Ptolemy: ah: borrowed it in order to have a copy made. Through an oversight, an excellent copy was returned, rather than the original."

"Has this been a common oversight?" I asked.

"Well, we do have several thousand original manuscripts from that library."

It figured. King or foot soldier, all Macedonians are thieves.

"There are a number of vacant tables, Senator, if you wish to read the book now."

"Actually, I would rather take it to the embassy and read it at my leisure, if that is permitted."

"We really prefer not to lend volumes outside the Library, Senator. Now that the original has disappeared, this is the only copy we have."

"If my investigation is successful," I said, "I think it very likely that I will be able to return the original to you." I kept the scroll in a tight grip.

"Well, that being the case, and in view of our sovereign's eagerness to please Rome in any way he may, I think we can make an exception in this case."

"You have my heartiest thanks, and those of the Senate and People of Rome," I assured him.

Back at the embassy, I called on Creticus. I found him going over correspondence from Rome and elsewhere in the Empire.

"If you don't mind, sir, I think I'd like to take a few days to do some hunting."

He looked up suspiciously. "Since when did you like to do anything more strenuous than watch other people race chariots? What are you up to?"

"I just need a bit of exercise. Too much of the good life, as it were."

"It's not as if you do much necessary work around here. Will you take Julia with you?"

"I don't think that would be proper, sir. We're not married yet."

"You're concerned about respectability? Now I know you're hiding something. What happened to this murder investigation of yours?"

"It will hold for a few days."

"Go, then. Stay out of trouble."

Hermes was no less amazed when I told him.

"Hunting?" he said. "You mean, hunting animals?"

"What else is there to hunt? Except for runaway slaves?"

"You've never done this before."

"All the more reason to start now. Go find us some hunting gear. This place has clothing and equipment for every sort of activity. We leave tomorrow as soon as it's light enough to see." Muttering and shaking his head, he went to do my bidding.

I found a comfortable corner and a pitcher of wine and settled down to delve into Biton's book. I slipped off its stiff leather cover and carefully began to unroll the crackling scroll. Unlike the original, this copy was made on Egyptian papyrus, another reason for its reduced bulk.

Biton began with a disquisition upon the history of war machines. These had been relatively rare and simple among the Babylonians and Egyptians and even rarer among the early Greeks. The Greek army that besieged Troy had not used them except for the wooden horse, which was not the same thing. But as men increasingly fought over fortified cities, these engines became necessary. At first they were mere towers for storming walls, covered galleries on wheels to protect rammers, and the various forms of missile-hurling device. Alexander's battles had mostly been of the open-field sort, and he had rarely resorted to engines.

Then came the Successors. These men had no new land to conquer, but they fought interminably among themselves over the carcass of Alexander's empire. This consisted primarily of seizing each other's ports, fortresses and capital cities. Such warfare called for engines, and to this endeavor the Successors brought the same mania for size and complexity that they brought to building.

Most notable of these was Demetrius Poliorcetes, "the Besieger," son of Antigonus One-Eye and the greatest military hobbyist of all time. He designed some of the strangest and certainly the largest engines of war ever conceived. He mounted storming towers on yoked ships for assaulting harbor walls. He built towers a hundred feet high equipped with dozens of catapults and completely plated with iron.

Others were not far behind. Dionysus, tyrant of Syracuse, had formed a sort of academy of military arts where the best engineers worked on engines and new designs of warship and new types of weapons and armor.

All this military experimentation had come to an end with the ascendancy of Rome. We beat them all because we knew that the ultimate weapon is the Roman legionary and the organization of the Roman legion. With them, even mediocre generals turn in victory after victory with monotonous regularity. An inspired general like (even now I hate to admit it) Caesar could accomplish marvels. And the Successors cared only about fighting. It was all they were good for. Romans value law and sound rule. But somebody believed that this inevitable tide of Roman rule could be reversed, and they thought that possession of some magic weapon would give them victory over the invincible legions.