“Did you go out for a look?”

“No need to. The magic that wards Paranor repels anything or anyone not invited in. Always has. Always will.”

“So she protects us?”

He smiled anew. “Druids might choose to see it that way. But that’s not really how it is. Grianne Ohmsford put the wards in place before she left the Keep for the final time. But the wards protect Paranor, not the Druids. The Druids are simply inadvertent beneficiaries. Along with anyone else who might be inside during an attack.” He rubbed his long nose with his finger. “Easier to protect something that doesn’t move around than something that does. Druids come and go. The Keep stays right where it is.”

She thought about it a moment. “So if there were an enemy inside—say, someone who managed to get invited in one way or another—the magic wouldn’t let the rest of us know.”

He gave her a long look. “What are you saying, Aphenglow?”

She shook her head. “I’m just mulling something over. This attack was provoked by someone who fired one of our rail slings from inside the walls of the Keep. I didn’t see who it was, and no one else I talked to saw, either. But I found the rail sling that was used, and it was clear from the angle of trajectory that using it served no purpose. The angle of attack was all wrong.”

“Then why …?”

“Bother? To provoke a response to an apparent attack from us. These were Federation warships, fully manned and armed, and although they claimed to have been invited by the Ard Rhys and came expecting to be received, there was no evidence any of this was so. What they seem to have come for was pretty much exactly what happened.”

Woostra nodded slowly. “So you think it was all planned? That the firing of the rail sling was a deliberate subterfuge by someone who was in their employ?”

“I think it possible. I haven’t found a better explanation.”

“And you don’t know who this someone is?”

“Not yet.”

He nodded again, and then went back to reading the papers in front of him. “Better find out then. No point sitting around here talking to me.” He looked up quickly. “But the magic that wards the Keep can’t help you with this. It can shelter you from attacks without, but not ferret out enemies within. Good luck, Aphenglow.”

She departed his office and went back out into Paranor’s halls, wondering what to do next. As she walked, she began going over the list of those who were within the Keep. She could eliminate herself and Bombax and Woostra and Arling. That left Cymrian, the Troll guards, and the boy who had rescued Bombax from the Mwellrets. If she was right about what had happened, it had to be one of them.