The linoleum floor of the St. Jude fire hall always had that faint, waxy smell of cheap disinfectant mixed with stale coffee, and on that Tuesday morning in October, my boots made a dry squeak against it. I had walked down from my house on Elm Street at a little past nine, the same way I had done every single year since Ronald Reagan was in office. Seventy years old is an odd place to be, mostly because you spend half your time trying to convince yourself you are still fifty and the other half apologizing to your joints for getting out of bed.

I brought my little laminated donor card in my purse, right next to my coupons for the Safeway and a packet of mints that had turned to dust around the edges.

Marcus was running the finger-prick station near the coffee urn, a young man with cropped dark hair and a plastic nametag pinned crookedly to his blue scrubs. I knew he was new because I didn’t recognize his face from the spring drive, and because his hands moved with that careful, slightly nervous precision of someone who hadn’t done this ten thousand times. He cleaned the tip of my left ring finger with an alcohol swab that felt ice-cold against my skin, then pressed the little spring-loaded lancet until it gave a sharp, familiar click. I didn’t even flinch. I’d given thirty gallons of O-positive to this county over three decades, and you get used to the ritual the way you get used to putting your seatbelt on.

He squeezed a dark drop onto the test strip, slid it into the little gray machine on the folding table, and waited for the green light. But the green light didn’t come. Instead, the screen blinked a dull, amber warning, and Marcus frowned down at the tiny liquid crystal numbers before sliding the tray back out with a soft click. He didn’t say anything to me, just reached into his drawer for a fresh lancet and took my middle finger this time, repeating the whole quiet procedure while the volunteers behind the snack table argued about whether the powdered donuts were fresh.

“Ma’am, I can’t take yours today,” Marcus said, and his voice was so low I almost missed it over the hum of the portable heater by the wall.

I laughed, mostly because I didn’t know what else to do with my hands, and shook my head the way old women do when a clerk tries to give them the wrong change. “I’m healthy as a horse, son. You must have gotten a bad drop.”

He didn’t laugh back, and that was the moment the room seemed to tilt just a fraction of an inch off its axis. He didn’t look at my face at all; he just reached for a blank white index card from the stack by his elbow, picked up a black ballpoint pen, and wrote a single number in the center of the paper. Then he folded the card in half twice, reached across the laminate table, and pressed it directly into my palm, curling my stiff fingers over it until my skin met his.

“Show this to your doctor this week,” he told me, and his eyes finally met mine, steady and entirely too serious for a church basement on a rainy Tuesday. “Please don’t wait.”

My fingers went still around that little folded piece of cardboard, the edges stiff against my thumb.

I had been tired since the daffodils came up in April, but I had blamed it on the humidity or the way my garden required more kneeling than it used to. I told myself that getting winded carrying the groceries up from the garage was just what happened when your calendar reached seventy, and I hadn’t mentioned it to my daughter Sarah because she always worried too much about my living alone in that big house.

I walked home slower than I had walked down, the wind off the river carrying that wet, rotting-leaf smell that always meant winter was right behind it. When I got to the kitchen, I dropped my keys on the counter and finally unfolded the card Marcus had given me. Written in neat, hurried block letters was a single decimal point and two digits that didn’t make any sense for someone who ate her spinach and took her vitamins every morning. I left the card right there next to the toaster, staring at it while the kettle boiled for tea I didn’t really want.

By Thursday morning, my chest felt like it was lined with wet wool whenever I reached up to dust the top shelves of the pantry. Sarah called while I was standing there holding a box of oatmeal, and before she could even ask how my week was going, I told her about the fire hall and the little white card sitting by the toaster. She didn’t yell, but her voice went that tight, level way it always did when she was about to take over my life.

“Get your coat,” she said through the speakerphone while I heard her car door slamming in her own driveway twenty miles away. “I’m picking you up in twenty minutes, and we are going straight to Dr. Evans.”

Dr. Evans’s office smelled of floor wax and old magazines, and the nurse practitioner didn’t waste any time getting me back into room three where the table paper crinkled every time you shifted your weight. Dr. Evans came in ten minutes later, a tall man with graying temples who had delivered my appendix out and remembered when my husband passed away in the VA hospital. He didn’t look at my chart first; he looked straight at the index card Sarah had pulled out of her purse and laid flat on his knee.

“Marcus is a good lad,” Dr. Evans said, tapping the corner of the card with his thumbnail. “He volunteers down at the station on his days off from the county lab. When he flags a number like this, we don’t argue with him.”

“It’s just low iron,” I said, smoothing my skirt down over my knees. “I’ve always been a little thin in the blood department ever since I was thirty.”

He turned my chart around on his clipboard, pointing to the columns of numbers from my physical twelve months ago and comparing them to the blank space beside today’s date. “Lillian, your hemoglobin last year was thirteen point five, which is respectable for a woman your age. Today, according to this reading, you’re sitting at six point eight. You’re walking around on half an engine.”

“I’ve been a bit tired,” I admitted, looking down at my shoes. “The garden got away from me in July.”

Dr. Evans folded the chart closed with a dry snap that made me flinch. “You haven’t just been tired. You’ve been bleeding somewhere inside for months, not weeks. Your body has just been quietly eating its own savings account to keep you upright.”

He reached for his prescription pad, but instead of writing for pills, he wrote out an order for an abdominal CT angiogram at the regional diagnostic center across town, complete with contrast dye and a price tag that made my breath catch in my throat. Nineteen hundred dollars was more than my property tax, and I sat there wondering how many months of electricity bills that little piece of paper represented.

“I can’t go spending that kind of money on a ghost hunt,” I muttered, shaking my head. “It’s just old age catching up, Doctor.”

Sarah leaned forward from the corner chair, her hands clenched tight in her lap. “Mom, stop it. If you won’t pay for it, I will, but we are going.”

The diagnostic center was a white, sterile box of a building where nobody looked at each other in the waiting room and the magazines were all about golf or architecture. Sarah sat beside me on the pleather bench for two hours while we waited for my name to be called, holding my hand with a grip that was almost too hard. When they finally called me back, a technician with a quiet voice guided me onto the sliding metal table of the scanner and fitted an IV line into the back of my right hand.

“You’re going to feel very warm,” she said, her voice floating down from a speaker in the ceiling. “Like you just stepped into a hot bath. Don’t worry, it’s just the contrast.”

The machine hummed like a low-flying airplane, and then that sudden, strange heat rushed up my arms and straight into my chest, making my face flush as the images clicked and whirred around me in the dark ring. I stared up at the little plastic star stickers some technician had stuck to the ceiling panels to keep children from being scared, and I wondered how long a person could drift along like a leaky boat before the water finally reached the gunwales.

Two days later, Dr. Evans called us back into his office, and this time he had the digital images pulled up on his wall monitor in shades of gray and stark white. He pointed to a tiny, tangled cluster of blood vessels deep in the small bowel, no bigger than a blackberry, where a slow, microscopic leak had been draining my life away drop by drop since the spring thaw.

“It’s called angiodysplasia,” he said, tapping the screen with a yellow highlighter. “It’s a little nest of fragile, malformed vessels that just decided to weep. It’s not cancer, Lillian, and it’s not going to kill you today, but if Marcus hadn’t stopped you at that table, another month of this would have put you in the ICU with a heart failure diagnosis.”

The outpatient procedure at the county hospital took less than an hour, with a gastroenterologist using a long, flexible scope to find the little weeping vessel and seal it off with a tiny thermal current while I was floating somewhere between sleep and waking. When I woke up in the recovery bay, the room was quiet except for the rhythmic beep of the wall monitor, and my mouth tasted like tin foil and ginger ale.

Sarah was sitting in the orange plastic chair beside the bed, reading a paperback book with her reading glasses slid down her nose, and when she saw my eyes open, she didn’t say anything dramatic. She just reached over and smoothed the gray hair back from my forehead, her palm warm and steady against my skin.

“They got it,” she said simply, as if we were talking about fixing a leaky garden hose. “The doctor said it’s closed up tight. You’re going to need iron infusions for a couple of months, but the leak is done.”

By January, the woolly feeling in my chest had lifted, and I could climb the stairs to my attic storage room without stopping to lean against the banister and pretend I was looking at the framed photographs on the wall. I went back to my garden in March, digging out the dead stalks of last year’s perennials with a strength I hadn’t realized I’d traded away, and every time I looked at my hands, I remembered the way Marcus had folded that index card into my palm without asking if I wanted it.

Now October has rolled around again, the air sharp and smelling of wood smoke and wet earth, and I am standing in the same drafty gymnasium at the St. Jude fire hall. My boots make that same dry squeak against the waxy floor, and the volunteers are arguing about the coffee maker in the corner while the line inches forward toward the folding tables.

Marcus is sitting in the same chair by the portable heater, looking a little older or maybe just more tired than he did last year, his nametag pinned crookedly to his blue scrubs. When it’s my turn, I step up to the table and lay my left hand out flat on the blue plastic mat without waiting for him to ask.

“Morning, Marcus,” I say, and my voice is steady enough that I don’t have to clear my throat.

He looks up from his tray of lancets, blinking twice before recognition settles into his eyes, and a slow, tired smile breaks across his face as he reaches for the alcohol swab.

“Morning, ma’am,” he says, taking my finger in his warm, dry hand. “Let’s see what you’ve got for us today.”