How did Harriet Tubman become the conductor of the underground railroad?

Harriet began her journey when she learned that her brothers were going to be sold, and she and her brothers planned their escape. Though the three escaped together, Harriet's brothers returned to the plantation. Harriet, on the other hand, continued her escape with the help of the Underground Railroad. After reaching Philadelphia, Harriet wasn't content to merely live a free life, working as someone else's housekeeper. She wanted to help others gain their freedom, and thus, she became a coinductor on the Underground Railroad.