From the New York Times:

“Growing up on the plantation there in Mississippi, I would work Monday through Saturday noon,” he said. “I’d go to town on Saturday afternoons, sit on the street corner, and I’d sing and play.

“I’d have me a hat or box or something in front of me. People that would request a gospel song would always be very polite to me, and they’d say: ‘Son, you’re mighty good. Keep it up. You’re going to be great one day.’ But they never put anything in the hat.

“But people that would ask me to sing a blues song would always tip me and maybe give me a beer. They always would do something of that kind. Sometimes I’d make 50 or 60 dollars one Saturday afternoon. Now you know why I’m a blues singer.”

And from the BBC News obituary:

It was while playing in one of the clubs that a fight broke out over a woman, causing a fire. After rushing out of the wooden building, he realised that he had left his guitar behind.

He risked his life by going back in to rescue his instrument. He named it after the woman whose charms had been behind the trouble: Lucille.