Request #466 From Allison

I have a book that’s been haunting me for years now, and I’d love to figure out what it was called. I remember the cover had a girl in overalls, and was maybe black and white. It was about a young girl who lived with her brothers and cousins, she was the only girl besides her mother and grandmother. And she was very close to her brother, and they would trace each others names onto the other’s back as a comfort thing at times. They had a baby brother who she helped take care of, but he dies unfortunately and the grandmother more or less blames the girl. She runs off upset and takes a small boat somewhere I believe – but her brother tracks her down and convinces her she’s not at fault. It’s all I really remember – any help would be SO appreciated!