“That’s right.” George hurried after him. If the priest was worried about traveling through Thessalonica by night without even a torch to light his way, he showed no sign of it. George said, “Uh, Your Reverence, the one thing I haven’t been able to figure out is how to get you out of the city and past the Slavs and Avars without them spotting you.”
“God will provide,” Father Luke said serenely. “His plans are hidden from mortal eyes, but never from His own thought. Now, I suggest you put on that extraordinary headgear you borrowed. You won’t want to leave the fellow at the postern gate any more confused than he is already.”
“You’re right about that,” George said. He and Father Luke were walking past the cistern where the priest had defeated the Slavic water-demigod. Seeing it reminded George how urgent their mission was. He set the leather cap on his head. He’d carried it till then, out of a vague sense that vanishing in front of Father Luke would be rude.
“Extraordinary,” the priest repeated when he did disappear.
No footpads came leaping out of deep shadow to assail Father Luke. That was as well for them, since he now had more unseen protection than the power of the Lord alone. On a cosmic scale, George supposed his using Perseus’ cap to baffle robbers would be only slightly more important than Gorgonius’ using it to spy on good-looking women, but, as a mere man, the shoemaker found the cosmic scale too large to worry about anyhow.
When he and Father Luke got to the Litaean Gate, he discovered a new crew of guards had come on duty since he’d entered Thessalonica. He was glad of that; as things were, the fellow who’d admitted him wouldn’t be faced with the improbability of Father Luke’s wanting to go out along with the flat impossibility of his own arrival.
The new man at the postern gate was surprised enough as things were. “Why on earth do you need to go out there, Your Reverence?” he asked Father Luke.
“Because I have reason to believe the Slavs and Avars are planning something particularly devilish, and I have the chance to forestall it,” the priest answered: all true, but none of it very informative. Father Luke put some snap in his voice, saying, “Are you going to listen to me, or shall we send for Bishop Eusebius to tell you what he thinks?”
George knew sending for the bishop was the last thing Father Luke wanted. The guard didn’t. Hastily, he said, “All right, Your Reverence. You know what you’re doing, I’m sure.” He unbarred the postern gate and pulled it open. Perhaps because it had been opened not long before to admit George, the hinges did not squeak much.
Father Luke got between the guard and the open gate for a moment. That let George slip out ahead of the priest The postern gate shut behind Father Luke. “Well, well,” he murmured, peering this way and that. “How best to get past the Slavs and into the woods?”
“Would you like to wear the cap yourself, Your Reverence?” George asked. “I got past them once in the daylight. I expect I can do it again.”
“No, don’t worry about it.” Father Luke stepped away from the sheltering shadow of the wall. “We’ll just go on and trust in God.”
In every church in Thessalonica, in every church in the Roman Empire, in every church in Christendom, priests preached sermons on the glory of martyrs. St. Demetrius was a martyr for the faith. George felt horribly certain Father Luke was about to become another one.
As Father Luke had stood between the guard and the postern gate, so now George stood between the priest and the encampment of the Slavs and Avars. He told himself that was useless: if he was invisible, the barbarians would see right through him and spot Father Luke. He kept on doing it anyhow, on the notion that it couldn’t hurt and might possibly do a little good. He didn’t know exactly how the invisibility worked. If it made people see around him instead of turning him transparent, maybe it would make the barbarians see around Father Luke, too.
With every step he took, he expected a hoarse shout from a Slavic sentry. He glanced back at Father Luke. The priest’s lips were moving in prayer. Maybe that was why the Slavs and Avars faded to spot him as he walked across the open ground toward the woods. Maybe George-- and Perseus’ cap--did help shield him. Whatever the reason, no outcry came.
In among first brush and then trees, George murmured, “Thank God.” Father Luke heard that. The shoemaker thought he smiled, though in the darkness he had trouble being sure. “Did I not say the Lord would provide?” the priest said quietly. “If He sent a chariot and horses all for fire for Elijah, surely He could manage something rather less dramatic for me.”
George wondered what sort of miracle God had worked. Had He cloaked Father Luke in a separate bit of invisibility, or had He used Perseus’ cap to His own ends? Could He do that with magic not His own? George had no answers, but those were intriguing questions.