I read the last page standing up. Rachel Moreno explained that her husband, Wade, had gambled away their savings and then started threatening her whenever she asked where the money went. That Friday night, after he fell asleep, she took her son and four hundred dollars and drove until the gas light came on. She had planned to sleep in her car. Then I covered six dollars without making her explain. She wrote that it was the first time in two years someone had asked nothing of her.

That small kindness made her drive to a women’s shelter she had passed on the highway instead of returning home. Staff there helped her file for a protective order, found her a job in a hospital laundry, and placed her in a small apartment within five days. The envelope also held a cashier’s check for six dollars and a child’s drawing of a gas station with a stick figure behind the counter. At the bottom, she asked me to show my manager the photograph and tell him everything.

My manager, Walt, was already holding his phone. The man in the gray jacket had come in that morning asking questions, and Walt had copied his license plate from the security camera before he drove away. Police arrested Wade that afternoon at a motel two miles down the road, carrying Rachel’s old phone and a printed map of every gas station on the highway. The protective order, the stolen savings, and a stalking charge sent him to jail for eight months, and the court returned $9,300 to Rachel.

Rachel came to the station the next Tuesday with her son, Mateo, who wore a little blue jacket. She hugged me across the counter, and I cried in front of the late-night customers. The owner heard the story and offered me the day shift with a raise. Every month, Rachel mails me a six dollar check with a new drawing. I never knew six dollars could feel so heavy, or so light.