“Well, Mars doesn’t talk to us anymore, and some pretty unscrupulous people have turned those Martian pharmaceuticals into something uglier, something they can sell for profit on the black market. But there were people around Wun Ngo Wen, people like Jason Lawton and his friends, who took Martian ethics seriously. I used to hear rumors, and there were always stories online, about that. About clandestine groups who took the longevity treatment the way the Martians did. Keeping it pure and not selling it, but sharing it, the way it was made to be shared, all strings attached. Using it wisely.”

She was nearly whispering now. Kyle’s eyes still followed the motion of her lips.

“I didn’t used to believe those stories. But now I think they’re true.”

This morning Bose had told her he wasn’t just a cop. He told her he had connections with people who followed the Martian customs. His friends hated the black market trade, he said. The police could be bribed, but Bose’s friends couldn’t, because they already had taken the longevity treatment—the original version. And what he was doing, he was doing in their interests.

She said this, very quietly, to Kyle.

“Now, the question you probably want to ask,” the question, as an older brother, he surely would have asked, “is, do I trust him?”

Kyle blinked, meaninglessly.

“I do,” she said, and she felt better for confirming it aloud. “It’s what I don’t know that worries me.”

Like the meaning, if any, of Orrin Mather’s sci-fi story. Like the bandage on Jack Geddes’s arm, and what it might imply about Orrin’s capacity for violence. Like the scar Bose had tried to conceal from her, and which he had still not explained.

Time passed. Eventually a nurse came down the pathway to the grove of live oaks, moving slowly in the heat. “Time to get this fella back to bed,” she announced. Kyle’s hat had fallen off, though that didn’t matter so much in the shade of the trees. His hair was thinning prematurely. Sandra could see his scalp, pink as a baby’s skin, through wisps of pale blond hair. She picked up the Astros cap and put it on him, gently.

Ah.

“Okay,” she said. “Rest easy, Kyle. See you soon,” she told him.

*   *   *

Sandra had studied psychiatry in order to understand the nature of despair, but all she had really learned was the pharmacology of it. The human mind was easier to medicate than to comprehend. There were more and better antidepressant medications now than when her father had endured his long decline, and that was a good thing, but despair itself remained mysterious, clinically and personally, as much a visitation as a disease.