Because it wasn’t a secret (Lord knew, it’d made enough newspapers), she said, “We were talking about those missing Mexicans out in Texas. That legion that up and disappeared a few months ago.”
“Ah, I see. A relatively safe topic, that.”
“What makes you say so?” she asked.
He shrugged. “Politics are funny,” he said. “But since that Texian is back in his own seat, I guess it gave the rest of the lads something to bond over, since none of them want him on board. It’s a shell game, really. Or, it’s like the old logic puzzles, about how to cross a river with a lion, a goat, an elephant, and . . . oh, I don’t know. Some other assortment of animals that may or may not want to eat one another.” Malverne Purdue took a teaspoon, swirled his mixture of coffee and alcohol, then brought the cup to his lips and took a draft too big to be called a sip.
“I don’t follow you,” Mercy replied.
He gestured with the teaspoon as he spoke. “It’s like this: On board this train we have a great contingent of Union soldiers,” he said, tripping over the word
“Sympathizers?” she said. “I’m sure I haven’t spotted any.”
“You been on the lookout?” he asked. When she didn’t answer, he went on. “We might as well assume it, ever since St. Louis. Can’t count on anyone in that bloodied-up territory. Bushwhackers, jaywalkers . . . I wouldn’t trust any of them as far as I could throw the
“That’s a threat I’m bound to remember.”
“Just take it as a warning to watch your words, and keep your eyes open.” His own eyes narrowed down to slits, then opened again as if realizing how wicked that expression made him look. He told her, “We’re not safe here, Mrs. Lynch. None of us are. We’re a target about a dozen cars long, fixed on a track that can be butchered with a few sticks of dynamite. And anything’s a possibility. I haven’t lived this long by assuming the best of people.”
“Spoken like a spy,” she said flippantly.
“A spy?” He sniffed a little laugh. “If that’s what I was doing with my days, I’d demand a larger paycheck. No, I’m just what was advertised: a scientist, in service to my state and my nation.”
In response to this Mercy asked, “How so? What’s your job here, on this train?”
The teaspoon went into action again, swerving around in the space in front of him. He wove it like a wand, as if to distract her. “Oh, structural things, you understand. It’s my job to see that the train and its engine run steady, and that there aren’t any glitches with the mechanics of the operation.”
“So the coupler breaking-that was the sort of problem you’re meant to catch?”
The scientist sneered. “Problem? Is that what you’d call it?”
“Train bodies aren’t my specialty. What would you call it, if not a problem?”
“I’d call it sabotage,” he grumbled.
“Sabotage! That’s quite a claim.”
The teaspoon snapped down with a clack. “It’s no claim. It’s a
“Have you said anything to the captain?” she asked.
“He was the first person I told.”
“That’s strange,” she observed. “I would’ve thought that if a spy or criminal was on board, the captain would have had all the soldiers out searching the cars, or asking lots of questions.”
He made a face and said, “What would be the point? If there’s a spy, he-or
Mercy had the very acute feeling that he did not actually mean that they should watch the passenger cars. Whatever he cared about was not riding along in a Pullman; it was being towed in one of the other, more mysterious cars-either the hearse in the back (as she’d begun to think of the car that held the corpses), or the cars immediately behind the
He sat there, temporarily lost in thought. Mercy interrupted his reverie by saying, “You’re right. All we can do is keep our eyes open. Watch the cars. Make sure no one-”
“Really,” it was his turn to interrupt, “we ought to watch
Then he collected his diluted coffee and retreated from the table, back into the next car up.
For all that Mercy instinctively loathed the man, she had to agree with him there. And, as a matter of self- preservation, she suspected she ought to keep a very close eye on Mr. Malverne Purdue
Fourteen

Topeka came and went, and with its passing, the
Dr. Stinchcomb greeted Mercy as a matter of professional courtesy, or possibly because Captain MacGruder made a point of introducing them, in case it proved useful in the future. The good doctor struck her as a man who was generally kind, if slightly detached, and over tea she learned that he’d served the Union as a field doctor in northern Tennessee for over a year. He was not much inclined to conversation, but he was pleasant enough in a quiet way, and Mercy decided that she liked him, and was glad to have him aboard.
This was significant because she’d known more than a few doctors whom she would have been happy to toss off the back of the train. But Stinchcomb, she concluded, might be useful-or, failing usefulness, he was at least unlikely to get in the way.
After tea, he retreated to his compartment in the second passenger car, and she saw little of him thereafter.
Topeka also saw the arrival and departure of a few other passengers, which was to be expected. Along with the doctor, cabin gossip told Mercy that the train had gained a young married couple who had freshly eloped and were on their way to Denver to explain things to the young lady’s parents; three cowboys, one of them another Mexican man by birth and blood; and two women who could have best been described as “ladies of ill-repute.” Mercy didn’t have any particular problem with their profession, and they were friendly enough with everyone, though Theodora Clay took a dim view of their presence and did her best to scowl them along their way any time they passed through on the way to the caboose.
Mercy took it upon herself to befriend them, if only to tweak Miss Clay’s nose about it. She found the women to be uneducated but bright, much like herself. Their names were Judith Gilbert and Rowena Winfield, respectively. They, too, would debark in Denver, so they’d be present for only another week.
The ever-changing social climate of the train was well matched with its constant movement, the ever-present jogging back and forth, the incessant lunging and lurching and rattling of the cars as they counted the miles in ties and tracks. It became second nature, after a while, for Mercy to introduce herself to strangers knowing that they’d part still strangers within days; just as it was second nature, after a while, to ballast and balance every time she rose from her seat, working the train’s side-to-side momentum into the rhythm of her steps. Even sleeping got easier, though it never became easy. But in time that, too, became a tolerable habit-the perpetual low-grade fatigue brought on by never sleeping enough, and never sleeping well . . . though sleeping quite often, for there was so little else to do.