I supposed his home's location was what had made Quadrumatus attractive as a potential host for Veleda. He had an isolated villa on the western side of Rome, so she could be brought up from Ostia and slid into the house without passing through any city gates and without too much attention from nosy neighbours and tradesmen.

There was one significant disadvantage. The priestess was the responsibility of the Praetorian Guard. I considered it critical that the Praetorian Camp lay outside the city too – but on the eastern side. The captive and her minders were thus separated by a three-hour walk across the whole of Rome, or four hours if you stopped for refreshments. Which, in my opinion, you would have to do.

That said, there was not much wrong with the place. Since Quadrumatus was a senator, he had a decent boundary thicket to stop sightseers watching his summer picnics in the grounds. These grounds were stuffed with shady stone pines and much more exotic specimens, jasmine and roses, topiary that must have been maturing since the time of his grandfather the consul, dramatic long canals, miles of triple box hedges, and enough statues to fill several art galleries. Even in December, the gardens were awash with groundsmen, so intruders looking for a priestess to snatch would be spotted long before they reached the house. If intruders came on foot, they would be weary anyway. I was, and my home was well placed for this adventure. I had only had to stroll along the Aventine embankment gazing at the muddy, swollen Tiber, nip across the Probus Bridge and head out through the Fourteenth District, the Transtiberina, which is the roughest part of Rome so you don't linger. I had passed the Naumachia on my left, the imperial arena for mock sea battles, then the Baths of Ampelidis on the right, and met the old Via Aurelia which travels into Rome by a shorter route than I had come on, passes the station house of the Seventh Cohort of Vigiles, and crosses the Tiber at the Aemilian Bridge, close to Tiber Island.