Caesar Moved Each Letter Four Places to Hide a Message

A courier could carry Caesar’s words in plain sight while their meaning remained displaced. Suetonius gives the key in a single example: when Caesar wanted to communicate secretly, he wrote the fourth letter after the one he meant. A appeared as D. No special ink or concealed compartment was required. The protection lay in an … Read more

Morning Light Was Vitruvius’s First Defense Against Bookworms

Before a Roman library received its first scroll, Vitruvius wanted its windows facing east. Morning light served the room’s use, he wrote, and books kept in that aspect would not decay. He described the alternative in physical terms. Libraries exposed toward the south and west suffered from damp winds. Moisture spread, books grew mouldy, and … Read more

Two Pounds of Cheese Baked Beneath a Roman Crock

Cato’s recipe begins with an instruction that would tire the cook before the baking starts. Put two pounds of cheese in a mortar and pound it thoroughly. Only when the cheese is fully broken down should flour enter the bowl. The ingredient list for libum is short: cheese, wheat flour and one egg. The process … Read more

Cicero Paid Half a Million Sesterces for One Table

Cicero paid half a million sesterces for one table. Pliny the Elder finds the purchase surprising both for its date and for the statesman’s limited resources. Yet price is only the first clue in his account of Roman citrus wood. The polished circle on which cups rested began as an abnormal growth around a tree’s … Read more

Salapia Escaped Its Sick Marsh by Moving Four Miles

Salapia did not repair its way out of an unhealthy site. It moved. Vitruvius says the inhabitants of the old Apulian city were continually unwell beside a stagnant marsh, so they petitioned Marcus Hostilius for permission to seek a healthier place. What followed was more than an evacuation. Hostilius bought an estate near the sea, … Read more