Endowed with his wealth, she opened a restaurant, laundries, boarding houses and other enterprises, rising on the social register and amassing a sizable fortune. It is widely speculated that her employee and close business partner Thomas Bell was her great love; she designed a 30-room Italianate mansion, found him a white wife, and they all moved in together. Rumors flew about the Thomas Bell Mansion—was it a brothel? did she practice voodoo rites? (she had lived in New Orleans and was friendly with the legendary "voodoo queen Marie Laveau, after all)—but like much of Mary Ellen’s life, the details are not fully known.
Also hidden from many white San Franciscans was Pleasant's race, though her advocacy was public. She sponsored many people who had escaped slavery, and conspired with abolitionist John Brown. In fact, it was Mary Ellen who gave him the funding for his failed 1859 Harpers Ferry Slave Revolt. The initials on a note Brown had in his pocket at his hanging read “WEP” instead of “MEP,” seemingly saving her from a similarly dire fate.
After the Civil War, she “came out” as a Black woman, which cost her her status among white society (she was slurred “Mammy Pleasant” in the San Francisco Chronicle and elsewhere). Nevertheless, she continued her fight against racial discrimination, Indeed at one point she sued the city for the rights of Black people's right to ride on the San Francisco streetcars (a century before Rosa Parks' defiance).
Court battles and difficulties obliterated her wealth, and Mary Ellen died in poverty in 1904. Today a street in SF's tony Nob Hill neighborhood is named Pleasant Street in her honor. Annoyingly, the park named in her memory is the smallest public park in the city—a plaque and six eucalyptuses in the Fillmore District.
And while many "facts" of her life may be unverified, in the the 2019 episode of Comedy Central's "Drunk History" Lisa Bonet depicts Mary Ellen as a sassy badass. We'd like to think if she were alive today, she'd have dreadlocks down to her behind!