“Does anyone plan to become a private detective?” Monaghan asks. “It’s not a rhetorical question. I suppose somewhere there’s a little boy or girl dreaming of life as an investigator, but everyone I know seems to have done some other kind of work first. Lawyer, cop. All I know is I did a favor for a friend, botched it royally, and then tried to help his lawyer get him out of the mess I created. When it was over, the lawyer pressed me to work for him as an investigator, then pushed me out of the nest and all but forced me to open my own agency.”

That lawyer, Tyner Gray, would end up marrying Tess’s aunt Kitty. Monaghan pretends to be horrified by this development but seems to have genuine affection for the man who has mentored her since she was in her late twenties.

Her agency, Keys Investigation, Inc., is technically co-owned by Edward Keys, a retired Baltimore police detective who seems to spend most of his time on Fenwick Island, Delaware. (Asked to comment for this story, Keys declined repeatedly and would not respond to rumors that he has, in fact, met Monaghan in the flesh only once.) Monaghan appears to be the sole employee on the premises of the onetime dry cleaners that serves as her office, although she jokes that there are two part-time workers “who have agreed to accept their compensation in dog biscuits.” Those would be Esskay, a retired racing greyhound named for her love of Baltimore ’s best-known sausage, and Miata, a docile Doberman with infallible instincts about people. “If she had growled at you, I wouldn’t have let you over the threshold,” Monaghan says. “I’ve learned the hard way to trust Miata.”

The office is filled with Baltimore-bilia-the old “Time for a Haircut” clock from a Woodlawn barbershop and several Esskay tins. “People give them to me,” Monaghan claims. “I’m not prone to collecting things.”

Has anyone ever commented on the irony that Monaghan, who sits beneath that “Time for a Haircut” clock, once had a most untimely haircut, when a serial killer sliced off her signature braid? Monaghan shot the man in self-defense, but not before he killed a former transportation cop with whom she was working.

“I don’t talk about that,” she says. “I understand you have to ask about it. I was a reporter, and I’d have asked about it too. But it’s something I never discuss.”

Okay, so life and death have been shot down as topics. What would she prefer to talk about?

“Do you think the Orioles are ever going to get it together? One World Series in my lifetime. It’s so depressing.”

Monaghan lives in a renovated cottage on a hidden street alongside Stony Run Park in the prestigious Roland Park neighborhood. That’s how she puts it, her voice curlicued with sarcasm: “Welcome to the prestigious Roland Park neighborhood.” The house continues the rather whimsical decorating themes of her office, with a large neon sign that reads “Human Hair.” What is it with Monaghan and hair?

“You’re a little overanalytical,” she counters. “One of the liabilities of modern times is that everyone thinks they’re fluent in Freudian theory, and they throw the terms around so casually. I don’t have much use for psychiatry.”

Has she ever been in therapy?

“Once,” she admits promptly. “Court ordered. You know what, though? I’d like to reverse myself. In general, I don’t have much use for psychiatry and I thought it was bulls-t when they put me in anger management. But it did help, just not in the way it was intended.”

How so?

“It’s not important,” she says, reaching for her right knee, a strange nervous tic that has popped up before. “Let’s just say that it doesn’t hurt sometimes to be a little angry.”

Monaghan is speaking in low tones, trying not to awaken her boyfriend. Six years her junior, Ransome works for Monaghan’s father, scouting the musical acts that appear at his bar. Ransome’s workday ended a mere four hours ago, at four a.m., while Monaghan’s day began at six a.m. with a workout at the local boathouse.

Monaghan and Ransome have been a couple, on and off, for more than four years. Do they plan to marry?

“You know what? You and my mom should get together. You’d really hit it off. She asks me that every day. Ready to experience the exciting life of a private detective?” She draws out the syllables in exciting with the same sarcasm she used for prestigious.

What’s her destination this morning?

“The most wonderful place on earth-the Clarence Mitchell Jr. Courthouse.”

And, truth be told, the courthouse does seem to be a veritable fairyland to Monaghan, who stalks its halls and disappears into various records rooms, greeting many clerks by name. But wouldn’t it be more efficient to work from her office? Isn’t most of the information online?

“Some,” says Monaghan, who also relies on an online network of female investigators from across the country. “Not all. And there’s a serendipity to real life that the Internet can’t duplicate. Do you use the library? For anything? Well, sometimes you end up picking up the book next to the book you were looking for, and it’s that book that changes your life. Google’s great, but it’s no substitute for getting out and talking to people. Plus, the courthouse is only a block from Cypriana. So whenever I come here, I can reward myself with a celebratory chicken pita with extra feta cheese.”

Isn’t 11:30 a little early for lunch?

“I’ve been up since six! Besides, you want to get there before the judges release the various juries for their lunch break.”

Whitney Talbot strides into Cypriana with the authority of a health inspector on a follow-up visit. Her green eyes cut across the small restaurant with laserlike intensity.

“She’s the opposite of Browning’s duchess,” Monaghan whispers. “Her looks go everywhere, but she dislikes whatever she sees.”

“I heard that,” Talbot says, even as she places her order. “And I like Cypriana just fine. It’s the clientele that worries me. I saw the mayor in here just last week. How am I supposed to digest lunch under those circumstances?”

She settles at our table with an enormous Greek salad, which she proceeds to eat leaf by leaf, without dressing. “Whitney’s not anorexic,” Monaghan assures me. “Her taste buds were simply destroyed by old WASP cooking.”

“I prefer to get my calories through gin,” Talbot says primly. “Now, what do you want to know about Tess? I know everything-everything. I know when she lost her virginity. I know the strange ritualistic way she eats peanut M &M’s. I know that she rereads Marjorie Morningstar every year-”

“I do not,” Monaghan objects, outraged only by the last assertion.

“… and cries over it too. I reread the Alexandria Quartet every year.”

“Because you’re so f-ing pretentious.”

“Pretentious suggests pretending, trying to make others believe that you’re something you’re not. There’s not a pretentious bone in my body.”

“There’s nothing but bones in your body, you fatless wench.”

Perhaps it would be better if Talbot were interviewed separately, out of Monaghan’s hearing?

“Why?” Talbot wonders. “It’s not as if I could be any more candid. My first name should have been Cassandra. I’m a truth teller from way back. It saves so much time, always telling the truth-”

“And never worrying about anyone’s feelings,” Monaghan mutters.

“Tess is still miffed because I’m the one who called her Baltimore ’s hungriest detective, back when the Washington Post did that travel piece on her favorite haunts. She does like a good meal, but she wears her calories well. So, okay, here’s the unvarnished truth about Theresa Esther Weinstein Monaghan, aka Tesser, although Testy suits her better.”