My first task each day was to visit the several professional receivers of letters, who were all located close together in a district near the waterfront, in hopes of finding a reply from my father to the letter that I had dispatched from Gaza. Day after day I was disappointed, until at last, one morning, one of the receivers produced a scroll with a tag that read: To Gordianus of Rome from his father. The letter had arrived along with payment for its delivery, so I was able to claim it even though my purse was empty.

I quickly walked to the harbor and sat on some steps that led down to the water. With the Pharos looming before me across the harbor, I carefully unrolled the letter. As I read, I saw my father’s face and heard his voice:

Beloved son,

Nothing has so cheered me in recent months as your letter sent from—can there really be a place called Gaza? I must admit, I had never heard of it. And yet, my son has been there—and to Babylon, and Ephesus, and Olympia, and to so many other places. The news of your travels fills me with wonder and joy, and no small amount of envy.

I fear the news from Rome is not so cheerful. Italy is riven with war between Rome and her oldest, closest allies. The subject cities of Italy demand a greater share of the benefits of empire. The Senate calls this rebellion. The result is fire, bloodshed, and famine.

Do not worry about me. I am perfectly safe as long as I remain in Rome. But the countryside is in chaos, and as a result the city is plagued by shortages and uncertainty, and travel within Italy is difficult. In short, this is no place for you, as long as you are safe and content to remain in Egypt. Toward that end, I have arranged for a bit of money to be deposited with a banker in Alexandria and to be made available to you. It is not much, but if you are frugal it may last you for some months, until it is safe for you to travel back to Rome. Attached to this letter you will find instructions on how to get hold of the money.

In your letter, you mention that Antipater is well. What a remarkable old fellow he is! What other man of his years would have dared to attempt such a journey? I hope that you managed to visit the Great Pyramid, and that he climbed all the way to the top, and that he is with you now in Alexandria, still in good health.

Write back to me when you receive this letter (and the money) and let me know that all is well.

I put down the letter, overwhelmed by homesickness. The sight of the Pharos across the water was suddenly strange and unreal, as if I had never seen it before. For a long moment, I felt disoriented and confused. Then other feelings rose in me—a heady sense of freedom and a thrill of excitement. Before, Alexandria had seemed merely a stop on my journey home; now, for the time being, it was to be my home. I blinked, and suddenly the Pharos looked familiar to me again, the proud landmark of the city where I was not merely a tourist, but a resident—Alexandria, the greatest metropolis on earth.

*   *   *

That night, as had become customary since our arrival, Antipater and I dined with our host. Isidorus possessed only one slave, who acted as both cook and server. While the woman poured wine and served a tilapia stew, each of us gave an account of his day.

I eagerly delivered my news first, and read aloud the letter from my father. This led to some discussion of the turmoil in Italy. Thanks to his position in the Library, Isidorus was privy to more reliable information than were the rumormongers in the marketplaces, but his sense of the situation was nonetheless quite murky. “No one can yet guess the outcome of such a devastating war,” he said. Then, seeing the distress on my face, he assured me that Rome itself would surely be spared from the destruction it had visited on several of its subject cities—a speculation that put images in my head that only added to my anxiety.

Our host quickly changed the subject to the funds my father had sent for me, and explained that my best course was to leave the money in the care of the banker who had received it, withdrawing drachmas only as I needed them. “You should also deposit any documents of importance with the banker, for safekeeping—that letter from your father, for instance.”

“Speaking of which,” said Antipater, “you must write back to your father at once. Give him my thanks for inquiring after my well-being, and be sure to inform him that I did indeed climb all the way to the top of the Great Pyramid.” He took a sip of wine. “And you, Isidorus—how was your day?”

Our host sighed. “Tedious. When you and I went our separate ways after arriving at the Library this morning, I spent several hours piecing together some fragments of the papyri I brought back from my journey up the Nile—only to discover that the document contained nothing more interesting than an inventory of some oxen involved in a bankruptcy litigation. When I asked my superior at the Library if I could be given more interesting work to do, we had quite an argument. Outsiders imagine that the Library and the Museum are a sort of pristine Arcadia, where we scholars lead lives of sublime contemplation, but my colleagues can be quite vicious and petty, I fear. How did Timon the Skeptic describe the Alexandrian scholars of his day? ‘Scribblers on papyrus, endlessly squabbling in their birdcage of the Muses!’ Alas, friend Zoticus, I hope your day was more productive.”

Antipater smiled. “Indeed it was.” He pressed his fingertips together and raised his chin. “I believe I may be ready to put forward a theory regarding the origin of the list of the Seven Wonders.”

“Truly?” said Isidorus. “Tell us, please.”

“Very well. While there remain some gaps in my research, and a few small contradictions that have yet to be resolved, this is what I believe: it was none other than Alexander the Great who decreed that there should be a list of Seven Wonders—and the list itself was devised by the first generation of scholars assembled here in Alexandria by the first King Ptolemy.”

“As an Alexandrian, this notion pleases me. But how did you develop this theory?”

“The first inkling came to me just before we left Rome, when I was pondering possible routes for our journey to the Seven Wonders. Studying maps, and noting the site of each Wonder, I was struck first by their far-flung and disparate locations—but then I realized what they had in common: all seven lie within the empire conquered by Alexander. Indeed, if one were to draw a line connecting and encircling them, one would produce a veritable outline of Alexander’s empire, comprising Greece, Asia, Persia, and Egypt. This was Alexander’s world, composed of many nations, races, and languages—and these were its greatest achievements. It occurred to me that the list of Seven Wonders might have been the brainchild of Alexander himself, who saw it as a unifying principle. ‘Never setting foot outside my empire,’ I imagined him saying, ‘one can see the greatest structures ever devised by mankind—made by different peoples at different times, in honor of different gods, but all brought together by the force of my will, within the unity of my dominion.’”

“Did Alexander himself visit all the Wonders?” I said.

“An excellent question, Gordianus. Most certainly he visited the Temple of Artemis when he liberated Ephesus, and saw the Mausoleum when he captured Halicarnassus; and in Babylon he must have seen the remains of the Hanging Gardens and the Walls, which may have been more substantial in his day than in ours. He refused to compete in the Games at Olympia, but he surely saw the statue in the Temple of Zeus. And after he conquered Egypt, he must have gazed upon its most famous monument, the Great Pyramid. So the list of Seven Wonders could also have served as a sort of memorial of his own journeys.”