Nathan Francis Mossell (July 27, 1856 – October 27, 1946) was the first African-American graduate of the University of Pennsylvania School of Medicine in 1882. He did post-graduate training at hospitals in Philadelphia and London. In 1888, he was the first black physician elected as member of the Philadelphia County Medical Society in Pennsylvania. He helped found the Frederick Douglass Memorial Hospital and Training School in West Philadelphia in 1895, which he led as chief-of-staff and medical director until he retired in 1933. Early life and education Nathan Mossell was born in Hamilton, Canada in 1856, the fourth of six children. Both his parents, Eliza Bowers (1824 – ?) and Aaron Albert Mossell I (1824 – ?), were descended from freed slaves. According to Mossell's autobiography, his mother's stories of the discrimination and hardship their families faced strengthened her own children's determination to succeed. Mossell's maternal grandfather had resisted all attempts by his owner to make him work and was eventually freed. He married and settled in Baltimore, but the entire family, including Mossell's mother, who was a child at the time, were deported to Trinidad. Mossell's paternal grandfather, who had been transported from the coast of West Africa, managed to buy his freedom and that of his wife. He too settled in Baltimore, where Mossell's father was born. Nathan Mossell's parents met and married in Baltimore after his mother's family return from Trinidad. His father learned the brickmaking trade and saved enough money to buy a house. After the birth of their third child, the couple decided to move to Canada, as free blacks were prohibited from being educated in Maryland and they wanted education for their children. They sold their house in Baltimore and settled in Hamilton, Ontario. His father bought a tract of clay-bearing land and set up his own brickworks. Nathan's siblings were the following: May (1848 - ?) born in Maryland. Charles (1850 - ) born in Maryland. He graduated from Lincoln University and studied theology in Boston, later becoming a missionary in Haiti. Boy, (c. 1853 – c. 1870), born in Maryland and died in Lockport, New York. Alvarilla (b. 1857 – ?), born in Hamilton, Canada. She worked with her brother Charles as a missionary in Haiti. Aaron Albert Mossell II (1863–1951), born in Hamilton, Canada. He was the first African American to graduate from the University of Pennsylvania Law School. He married