There was a small chamber to turn in, from which an excavated passage ran under the yard wall. It was high enough to walk without crouching, and smooth underfoot. Everywhere was thoroughly lined with mortar, and quite dry. Enough light came from the manhole to fumble my way to a heavy open doorway where I stayed, secure in the outer darkness of the passage, to observe the man I had followed as he spoke to Helena. It was the younger Camillus brother, her Uncle Publius.

What I still did not know was whether he had come as a villain, anxious to secure his loot—or whether, like me, he was an innocent, merely curious citizen.

LIX

Publius and Helena held a lamp each. Beyond these tiny orbs, which glowed upon their faces with sick translucency, gloomed a black rectangular mass.

“So you’re here!” Camillus Meto exclaimed, with the mild astonishment of a man who had imagined a young girl would want to watch the Triumph. From the acoustics as he spoke I gathered they were in a small chamber, densely packed. “Did I startle you?”

Neither seemed particularly alarmed; I was. I could hear my heart knocking like an airlock in a narrow bronze water-pipe.

Helena Justina had been standing quite still in the underground room as if lost in thought. She must have heard her uncle’s footsteps, but she showed no surprise. She spoke to him cheerfully, like any relative. “Look at this! The saffron vault keeps a good secret. I wondered if the soldiers would have found it. Obviously not!”

“You knew about this place? Did Pertinax bring you here?”

“To show me the perfumes, several times. We were married then, of course. His dry cellar, with a secret door, where the most costly spices could be locked away. Such a simple trick, having the entrance in the lane outside—I never believed him when he said it was safe…I’ve found some other lamps—” She began lighting them with a spill, then they both stared.

It was a low vault, with slabs of rough-hewn stone forming shelves where ceramic jars and glass vessels stood like elixirs in an apothecary’s shop. Here, apart from the dried saffron filaments from bright Bithynian crocuses which gave the cavern its familiar name, Pertinax and Publius Meto had secured their precious oils, safe from the excise and from any light-fingered warehousemen of their own. You could not smell the saffron for the much more concentrated perfumes which haunted the place with their enclosed, ambrosial scent. But Helena and her uncle did not notice those. Filling most of the floorspace was a sombre block, chest-high, which chilled the memory of an ex-lead-mine slave: silver ingots by the score stood stacked in the gloom, as regular and tight as turf blocks built into a military wall.

I could see Camillus Meto was watching his niece.

“Is Falco here with you?”

“No.” Her voice was hard.