Donaldina Cameron (July 26, 1869 – January 4, 1968) was a New Zealand-born American Presbyterian missionary who was a pioneer in the fight against slavery in San Francisco's Chinatown, who helped more than 2,000 Chinese immigrant girls and women escape from forced prostitution or indentured servitude.

[3] During her childhood, she had very little contact and experience with immigrant populations while living on a large sheep ranch in the San Gabriel Valley.

[4] Family friend Evelyn Browne, the former president of the Occidental Board of Foreign Missions, took Cameron to the Presbyterian Home in San Francisco, in an effort to expose Donaldina to the world around her.

[3] Culbertson and the Presbyterian Home acted as a place of refuge for women forced into sex slavery and freed indentured female Chinese servants, where they could be safe from the outside world and get an education.

Originally passed to prohibit the sex trafficking of East Asian women and an influx of East Asian male laborers, it instead created a dangerous and illegal system where young women would present forged papers that said they were already members of Chinese families in the United States.

The women, often referred to as mui tsais, were sold as domestic servants or forced prostitutes by the tongs (criminal societies).

During this time San Francisco City Hall, run by Abe Ruef and Eugene Schmitz, took kickbacks from the tongs, resulting in very little government action against this problem.

She continued the mission of the Home, saving young Chinese immigrant women from sex slavery and indentured service.

welcomed conversion and saw Donaldina as a savior, nicknaming her "Lo Mo" (Chinese: 老母; Jyutping: lou5 mou2) (which she translated as " loyal mother"), and others[who?]

Cameron returned the night of the earthquake through the blazing city to retrieve a logbook that detailed her guardianship over the girls at the home, thus ensuring their safety from being forced back into servitude or prostitution.