“I’m the lieutenant,” Lee said. “It’s my job to know more than the soldiers under me. If I’m offering you more than Private Hughes, it’s because I know more, not because she’s holding out on you.”

“Indeed,” Two said. “That’s good news for Private Hughes, then.”

Lee smiled, knowing now that Hughes was the other soldier held and that for now, at least, she was still alive. “What else do you need to know?” she asked.

“At the moment, nothing,” Two said. “But I will be back with more questions later. In the meantime, Six will tend to your needs. Thank you, Lieutenant Lee, for your cooperation.”

“Delighted,” Lee said. And with that, she assumed, Two had wandered away from his microphone to do whatever it is that he did, presumably talk to fellow conspirators (of which Lee assumed there were at least five).

She heard Six moving about in the room. “Do you mind if I talk?” Lee asked. “I know you can’t answer. But I have to admit this entire incident is making me nervous.” She began talking, primarily about her childhood, while Six fed her and gave her water and then tended to her bodily needs. After twenty minutes, Six went away and Lee shut up.

It was the room’s acoustics that had given her the idea. Lee had spent years as a performing and recording musician, and part of her job was to make sure the room, whatever room she was in, wouldn’t defeat her instrument or her band. She’d played enough basements with stone and concrete walls to know just how much the sound bouncing off the walls would mess with the performance and also what sorts of materials made what sort of sonic response. She could close her eyes, strike a note in a room and tell you, roughly, how large the room was, what materials the room was made of and whether there were objects in the room bouncing sound off of them. She wasn’t, alas, good enough at it to be able to make an entire map of a room that way.

But her BrainPal was.

For two and a half hours Lee had talked, almost constantly, moving her head as much as she could, risking a neck chafe from her restraining strap. As she talked, her BrainPal took the data from her voice (and from Two’s) and used it to paint a picture of the room, marking every surface that sound reflected off of, polling the delay between the ears to locate the surface in the room and adding each additional piece of data to give a complete audio portrait of the room, of Six and of everything within earshot.

What Lee had learned: