In 1863 and 1864, eight former slaves toured the northern states to raise money for impoverished African-American schools in New Orleans; four children with mixed-race ancestry and pale complexions were deliberately included to evoke sympathy from white northerners. Photographs of Charles Taylor, Rebecca Huger, Rosina Downs, and Augusta Broujey were mass-produced and sold as part of the campaign.
People who don't read history books are unaware that a huge number of "cowboys" driving herds to the railheads in Kansas were Indians. And many don't know that some of "Indians" who raided the drives for beef in the the "nations" were runaway slaves and ex-slaves adopted into the tribes in the Oklahoma territory. Western movies don't tell you that.