Bridget "Biddy" Mason

She used her freedom to become a licensed doctor’s assistant before eventually founding her own private practice as a nurse and midwife in Los Angeles. Through careful saving, she accumulated significant wealth, which she used to provide affordable housing, a daycare center, and disaster aid for the Black community around her. see https://shastascout.org/golden-ghosts-black-californians-remarkable-journeys-to-freedom-during-californias-gold-rush/