“WHAT’S THE TRUE story about Famia, then?” asked Petro, running into me in Fountain Court the next morning. I shrugged and said nothing. He gave me a sour look. I avoided his eye, once again cursing Famia for putting me in this position. “Bastard!” Despite his annoyance, Petronius was looking forward to trying to force it out of me.

“Thanks for taking Pa off last night.”

He knew I was trying to change the subject. “You owe me for that. I had to let him drag me to Flora’s and drink half my week’s salary.”

“You can afford a long night in a caupona then?” I asked narrowly, as a way in to probing where he stood with his wife.

Arria Silvia had left him, over what Petro regarded as a minor infringement of the marital code: his crazy affair with a dim daughter of a prime gangster, which had cost him suspension from the vigiles and much scorn from those who knew him. The threat to his job had been temporary, like the affair, but the loss of his wife-which meant the virtual loss of his three children-looked likely to be permanent. For some reason, Silvia’s angry response had come as a surprise to Petronius. My guess was, he had been unfaithful before and Silvia had often known it, but this time she also had to live with the unpalatable fact that half the population of the Aventine were grinning over what had been going on.

“I afford what I like.”

We were both dodging. I hoped this was not some fatal result of our attempted partnership. That had been just before I shackled myself to Anacrites. As friends since the army, Petronius and I had expected to be ideal colleagues, yet we had cut across one another from the start, each wanting his own way of doing things. We parted company after I found a chance to make a spectacular arrest without him; Petro reckoned I had kept him out of it deliberately. Since he was my best friend, breaking up with him had hurt.