The woman on the bench looked up at me and said, “I knew you’d be tall.”

I was fifty-one years old. That was the first sentence my birth mother ever spoke to me.

I hadn’t planned on finding her. I took a DNA test for the health stuff, cancer risks, that kind of thing.

What I didn’t expect was a match with a second cousin I’d never heard of. That led to a name. Margaret.

I found a Facebook profile with an old picture. Gray hair, small smile. I stared at it for three days before sending a message. I wrote something stupid like, “I think you might be my biological mother.” I hit send and immediately wanted to throw my phone in a river.

She replied within an hour. “I’ve been waiting my whole life to get a message from you.” We talked on the phone once. Her voice was soft and careful. She said, “I don’t want to overwhelm you. But I have a lot to tell you.”

I flew to Chicago. The whole flight I thought about turning around. But I kept seeing her face. I walked through the park and spotted her on a bench. She was smaller than I pictured. White hair, small hands. She stood up when she saw me and said exactly what I just told you.

We sat on that bench for four hours.

She told me she was seventeen, alone, terrified. Her parents made her sign the papers. She said she spent the next three years trying to get me back. Went to the courthouse, the agency, anyone she could find. “They wouldn’t let me in the building,” she said. “They told me the case was closed.”

Then she told me about my father. A kid from a diner. Gone before she knew she was pregnant. “I never loved anyone else,” she said. She never married. Never had other kids.

“I had one daughter,” she said. “And I lost her.”

I asked how she survived that. She smiled and said, “I wrote. I wrote to them, to you, to anyone who would listen. It was all I could do.”

Then she reached into her purse and pulled out a stack of envelopes. Thick. Maybe four inches. Held together with a rubber band that was dry and cracking. She put it in my lap.

“These are all the letters I sent to the adoption agency,” she said. “Asking about you. They returned every single one. Unopened.”

I looked at the top envelope. Her handwriting was neat and small. The stamp had been canceled. And across the front in bright red: “Return to Sender.”

I didn’t open anything in front of her. I just held the stack. She put her hand on mine.