Bayek visited the Lumber Depots situated south of the aqueduct, where he heard a conversation between two workers.
- Man 1: Stop pissing off the foreman! Last thing we need is to get shipped off to the aqueduct!
- Man 2: That place is the bowels of Hades. I saw cousin Houi yesterday he said the Romans will start making examples of people soon, cut a few threads.
- Man 1: Romans! Ha! Sometimes I wonder if we made the right decision coming here... Faiyum was not so bad.
Bayek approached both men.
- Man 2: The foreman sent a guard to check on us? We were not complaining! We were working hard!
- Bayek: I am not a guard, I am a Medjay from Siwa. Does he treat you badly? The work here looks back-breaking.
- Man 1: No! Compared to the Siwans up at the aqueduct we are revered like pharaohs!
- Man 2: I would not go that far.
- Bayek: Are there problems at the aqueduct?
- Man 1: Some snooty engineer, Vitruvius. He is working our countrymen to death. And now the Roman army is involved. Which is never good...
- Bayek: I will see what is going on, seni.
Bayek headed up north to the aqueduct, where he found a group of soldiers preparing to punish a worker.
- Roman soldier: Maybe the lash will loosen your tongue.
The soldier raised his weapon, but a Roman man stepped between him and his victim-to-be.
- Vitruvius: Enough! My workers are not to blame. Send me some soldiers with half a brain, or we'll never find my dioptra.
- Roman Soldier: General Agrippa will hear of this! A Roman standing up for Egyptians! Pathetic!
The soldiers made to leave the place.
- Vitruvius: Tell Agrippa I need real soldiers who will help me find these thieves! Now scuttle back to your wine you sacks of uselessness.
Bayek addressed Vitruvius.
- Bayek: Are you the one responsible for working my people to death?
- Vitruvius: Your people? They are my people, I'm keeping them alive in the face of increasingly bad odds. But who are you, my Egyptian friend?
- Bayek: Bayek of Siwa. Protector of these people.
- Vitruvius: Well Bayek of Siwa, I am Vitruvius and contrary to popular belief not all Roman are your enemy.
If you would help your people, then help me. Our tools have been stolen. My surveying tool, the dioptra specifically. Without it construction has stalled on the aqueduct. The General's idiots believe my workers are to blame.
- Bayek: Maybe I can look for this... dioptra?
- Vitruvius: With it, this elevated river would flow into the farms of Cyrenaica. Talk to Dedi up at the construction site. He used it last. Fortuna go with you, Bayek of Siwa.
Bayek climbed up the construction site and found a man on top of the aqueduct.
- Bayek: Are you Dedi?
Dedi attempted to flee.
- Dedi: Hades' fiery crotch! I did not take it, please do not kill me.
- Bayek: Dedi, wait!
Bayek pursued after him across the aqueduct, eventually to a dead end.
- Bayek: Calm down, I won't hurt you, just tell me where the dioptra is.
- Dedi: It was lunchtime and my wife brought me a fresh roasted chicken leg for lunch which was nice as it has been an eon since I had...
- Bayek: Sounds delicious but get to the part about the master's tool? Your lunch won't solve this crime...
- Dedi: Oh I see. Well I left the dioptra in the cave and when I came back it was gone. Scrobbled away by wolves, spirits or worse!
- Bayek: What does this dioptra look like?
- Dedi: Like a brazier, made of three parts. A bit you see through, a bit you measure with...
- Bayek: I will find it, just try not to die of fright before then.
Bayek made his way to a cave, where Dedi had claimed to have lost the dioptra parts in. He climbed up a cliff in order to venture deeper into the cave, finding that it was occupied by a group of bandits.
- Bayek: A bandit den. Well at least we know it was not spirits that stole the tool.
He recovered a dioptra stand on a table.
- Bayek: Looks like a piece of the dioptra.
Bayek headed further up the camp and found another piece.
- Bayek: Part of the missing surveying tool.
Bayek went out of the cave and headed up the mountains where he came across a ruin. He eliminated the bandits and recovered a part from one of them.
- Bayek: Another piece of the tool.
After collecting all the pieces, Bayek mused.
- Bayek: I should return to Vitruvius, before the Romans make an example of Dedi.
Bayek climbed down the mountain and returned to Vitruvius.
- Vitruvius: You have it? You have my dioptra?
- Bayek: I found it in a bandit camp above the aqueduct.
- Vitruvius: Really? Some of my workers complained of hearing whispers from there, believed it was haunted. I was sure it was just superstitious nonsense.
- Bayek: I dealt with it. Nothing will haunt you now, living or dead.
- Vitruvius: Excellent and now General Agrippa has no more reason to bully my workers. He's become more ambitious since Flavius returned from Siwa and it is not a welcome change. Thank you Bayek, you saved my... our people's lives. I am in your debt.
- Bayek: Fortuna smile on you, Vitruvius. Your work will help a lot of people in Cyrenaica.
Bayek helped the engineer Vitruvius to recover his dioptra tool, allowing him to resume work on the aqueduct.