The Square Root of Murder (Professor Sophie Knowles)

wished she could take back the words. Our throat clearings and gulps were louder than whatever was clacking around in the dryer.
    “Can I get a tour?” Rachel asked.
    Gil gave Rachel a look that I couldn’t interpret, but it was clear by her expression that being a docent wasn’t on Gil’s agenda. I sensed that Rachel wasn’t that interested anyway, but simply putting off our conversation.
    Gil moved quickly out of her unpleasant reaction to Rachel’s request. “You bet,” she said. She rubbed her hands together, scraping away her inadvertent reminder of the murder of someone close to us, and led the way down the hall.
    It was sobering to realize how easily we returned to normal.
    I was dismayed to note that my headache was back.

CHAPTER 7
     
    I’d visited the MAstar facility many times during my five years with Bruce and learned something new each time. First, that star was not a reference to flying up where the heavenly bodies were, but an acronym for “shock, trauma, air rescue.” He’d taught me other acronyms, like LZ for “landing zone” and AGL for “above ground level.” He’d had me lie down in the back of the aircraft to see how efficiently everything was laid out, each medical supply or instrument with its own slot. I was most impressed by a field EKG system that generated a report and transmitted it to the hospital before the patient arrived.
    Today was different, the first time I was here without him. It felt strange to walk by the room he shared with another pilot, knowing he was now most likely napping in his own townhouse bed. I peeked in—once I knew his roommate was outside kicking the tires on the helicopter—and checked out the row of photos on Bruce’s side of the dresser. I knew what to expect—small framed shots of the two of us on favorite outings, and a grade school picture of Melanie, his only niece, whom he adored. I felt a pang of missing him and couldn’t wait until he was off for seven days, starting Monday morning.
    With classes cancelled, that meant we were both off for a stretch and might be able to get out of town for a few days. The scorcher days were perfect for a trip to a sweet Hyannis beach.
    It was a nice thought, until I recalled the reason summer school had been interrupted. My gaze fell on Rachel, walking slump-shouldered between Gil and me, her pink flipflops slapping pitifully on the floor. Something told me not to get psyched for anything other than helping her until further notice. The Cape would have to wait.
    We tiptoed past a bedroom with a closed door.
    “Don’t worry about making noise,” Gil said. “You’d never be in this job if you needed a lot of privacy or the comforts of home. But it’s the perfect career for a family person.”
    Rachel registered surprise. “I would have thought just the opposite.”
    I knew better. The dynamic worked especially well when both parties had flexible schedules, as was true for Hal and Gil and for Bruce and me. Neither Bruce nor I was a Monday-to-Friday, nine-to-five kind of person, and neither were the Bartholomews, I suspected. It was the perfect combination: an EMS job offered long stretches of days off, and most college teachers, like Hal, had at least one day off a week during the regular semester, ostensibly to do research. Timmy Bartholomew, a kindergartener, was guaranteed to have one parent or the other free to drop him off or pick him up.
    “Flight nurses work two twenty-four hour days in a week,” Gil told Rachel.
    “Like, forty-eight hours straight?”
    “Not necessarily. I came on at four o’clock yesterday, and I’ll be here until four this afternoon. But of course, we’re not usually up and working all those hours. And then”—Gil spread her fingers, palms up—“I’ll have four whole days off. Then back for twenty-four, and so on.”
    Rachel seemed to be considering this trade-off. At this point in her grad school life, even one day off without homework or lab work to think about would appeal to her.
    Gil helped us settle in her room, pulling in an extra chair and carrying two glasses of iced tea on a tray. Were all flight nurses this agile?
    I was pleased to see a copy of the puzzle I’d handed out at the party lying on top of a stack of puzzle books from my competition. I couldn’t help sneaking a look to see how far along Gil had gotten. I ran my finger down the page. Not bad. Maybe Gil would be the one to validate this new entry of mine.
    Gil caught me reviewing her