Emily and Hamish gazed at the two treecats in something very like awe, and Nimitz and Samantha returned their looks calmly.

“So what happens,” White Haven said slowly, “is that these… ‘memory singers’ are able to share the new concept or the new ability with whatever ’cat it first occurs to, and then to transmit it, like a gestalt, to all the others.” He shook his head. “My God. They may be slow to think of new things, but once they do, they’re certainly equipped to spread the good news!”

“Yes, they are,” Honor agreed. “But the individuals who are most important of all to the ‘cats are the innovators who are also memory singers in their own right. Apparently, a sister of Lionheart, the ’cat who adopted my great-great-great-whatever-grandmother, was exactly that sort of memory singer, and pretty nearly single-handedly convinced all of the other ’cats that human-’cat bonds were a good idea.”

“Which brings me to the point of this somewhat long-winded explanation. You see, none of the ’cats had been able to make heads or tails out of the way that humans communicate until one of their memory singers was injured in a fall.”

Her expression darkened for a moment. Then she shook it off and continued levelly.

“As I’m sure you both know, Nimitz was… injured when we were captured, and he lost his mind-voice as a result. He can no longer ‘speak’ to any of the other ‘cats, which was why my mother came up with the brilliant idea of teaching him and Samantha to sign. It had been tried centuries ago without any success, but that was mostly because at that time the ’cats still didn’t understand how human communication worked. Since they didn’t use words at all, they simply couldn’t make the connection between hands communicating information and thoughts any more than they could connect ‘mouth-noises’ to doing the same thing.

“What had changed by the time Nimitz and Sam came along was that the memory singer the ’cats call Singer From Silence had lost not her mind-voice, but her ability to hear other mind-voices. She could still taste emotions, still sense the mind-glow, but she was deaf to everything else.”

She drew a deep breath.

“It must have been devastating, especially for a memory singer. She could still project, still share the memory songs she’d learned before, but she could never learn a new one. For that matter, she could never be entirely certain that anyone else ‘heard’ her properly, because there was no feedback channel, no way for her to be sure her signal hadn’t been garbled.”

“So she left her clan, gave up her position as one of its elders, and moved to Bright Water Clan—Nimitz’s clan, the same one Lionheart came from. She chose Bright Water because it’s always been the clan with the most intimate contact with humans, and she wanted to spend time around the two-legs. She knew we communicated somehow without mind-voices, and she wanted desperately to learn how we did it in the hope that possibly she could learn to do the same thing.”