Mabel Walker Willebrandt was a lady who lived a long time ago and did some important things for the country she lived in, which was called the United States of America. She lived from 1889 to 1963, which means she lived for a very long time.
When Mabel was a young lady, she studied a lot and learned many things about the law. This means she knew a lot about the rules that people have to follow and how to make sure everyone is being fair and safe. She became a lawyer and worked really hard to help people understand the law and how it could help them.
Mabel was so good at what she did that she got a very important job working for the United States government. She was a lawyer for a group called the Department of Justice. Her job was to make sure people followed the law and didn't do anything that could hurt other people or the country.
One thing that Mabel is remembered for is that she helped the government catch people who were breaking the law by selling and making alcohol when they weren't allowed to. This was called Prohibition and it happened a long time ago when people weren't allowed to drink alcohol because it was causing problems.
Mabel worked really hard to make sure people followed the rules and didn't do anything that was against the law. She wanted to make sure that everyone was safe and happy and that people were being fair to each other. Even though she died a long time ago, people still remember her for the great things she did to help the country.