Question: What outspoken abolitionist and author of "An Appeal to the Coloured Citizens of the World" was also the father of one of the first black men to pass the Massachusetts bar?

Context paragraphs:
The Pact (2002 book): The Pact: Three Young Black Men Make a Promise and Fulfill a Dream is a 2002 New York Times Bestselling non-fiction autobiography by Sampson Davis, George Jenkins, Rameck Hunt, and Lisa Frazier.  The book was first published on May 23, 2002 through Riverhead Trade and was later republished through Prentice Hall.  "The Pact" covers the lives of Davis, Jenkins, and Hunt, three young black men who made a pact to graduate from college and become doctors rather than to succumb to the violence in their community.  In 2003 the book won a "Books for a Better Life Award" for "First Book", also being named one of the "Library Journal's" "Best Audiobooks of 2002".

Donald McKayle: Donald McKayle (born July 6, 1930 in New York City) is an American modern dancer, choreographer, teacher, director and writer best known for creating socially conscious concert works during the 1950s and '60s that focus on expressing the human condition and more specifically, the black experience in America.  He was, "Among the first black men to break the racial barrier by means of modern dance,".  His talents extend beyond the concert stage as McKayle has also performed and choreographed for Broadway musicals, theatre, television, and film.  He has worked with many choreographers such as Martha Graham, Alvin Ailey, Anna Sokolow, and Merce Cunningham.  A Tony Award and Emmy Award nominee, McKayle is currently a Professor of Dance, Modern Technique and Choreography, at UC Irvine, in the Claire Trevor School of the Arts Dance Department.  He has served on the faculties of Connecticut College, Sarah Lawrence College, and Bennington College.

Lee Lorch: Lee Alexander Lorch (September 20, 1915 – February 28, 2014) was a mathematician, early civil rights activist, and communist.  His leadership in the campaign to desegregate Stuyvesant Town, a large housing development on the East Side of Manhattan, helped eventually to make housing discrimination illegal nationwide but also resulted in Lorch losing his own job.  He and his family then moved to the US South where he and his wife, Grace Lorch, became involved in the civil rights struggle there while also teaching at several Black colleges encouraging black students to pursue studies in mathematics and mentoring several of the first black men and women who were later to go on to earn PhDs in mathematics in the United States, before moving to Canada.  He ended his career as Professor Emeritus of Mathematics at York University in Toronto, Canada.

John Rock (abolitionist): John Stewart Rock (October 13, 1825 – December 3, 1866) was an American teacher, doctor, dentist, lawyer and abolitionist, historically associated with the coining of the term "black is beautiful" (thought to have originated from a speech he made in 1858, however historical records now indicate he never actually used the specific phrase on that day).  Rock was one of the first African-American men to earn a medical degree.  In addition, he was the first black person to be admitted to the bar of the Supreme Court of the United States.

David Walker (abolitionist): David Walker (September 28, 1796August 6, 1830) was an outspoken African-American abolitionist, writer and anti-slavery activist.  Though his father was a slave, his mother was free so therefore he was free.  In 1829, while living in Boston, Massachusetts, he published "An Appeal to the Coloured Citizens of the World", a call for black unity and self-help in the fight against oppression and injustice.

Edward G. Walker: Edward Garrison Walker, also known as Edwin Garrison Walker (1830–1901), was an American artisan in Boston who became an attorney in 1861; he was one of the first black men to pass the Massachusetts bar.  He later became a politician and in 1866, nine years after the state extended the franchise to African-American men, he and Charles Lewis Mitchell were the first two black men elected to the Massachusetts State Legislature.  Walker was the son of Eliza and David Walker, an abolitionist who had written an appeal in 1829 calling for the end of slavery.

Victor-Eugene McCarty: Victor-Eugene McCarty (also Macarty, McCarthy or Macarthy, born between 1817 and 1823), a Louisiana Creole, was one of the first of several prominent free black composers in New Orleans, best known for publishing "Fleurs de salon: 2 Favorite Polkas" in 1854.  In the 1840s he was among the first black men to study music abroad, at the Paris Conservatory.

Violet King Henry: Violet Pauline King Henry (1929-1981) was the first black woman lawyer in Canada, the first black person to graduate law in Alberta and the first black person to be admitted to the Alberta Bar.  She was also the first woman named to a senior management position with the American national YMCA.

John Leland (Baptist): John Leland (May 14, 1754 – January 14, 1841) was an American Baptist minister who preached in Massachusetts and Virginia, as well an outspoken abolitionist.  He was an important figure in the struggle for religious liberty in the United States.  Leland also later opposed the rise of missionary societies among Baptists.

Inez C. Fields: Inez C. Fields, a native of Hampton, Virginia, became one of the first known black women to become a second-generation lawyer.  She graduated from Boston University School of Law in 1922 and became the second black woman admitted to the Massachusetts bar on April 15, 1924.  Fields did not remain in Massachusetts, but instead returned to Virginia, where she joined her father's law firm in Hampton.  On November 7, 1928, she became the third black woman admitted to the Virginia bar.  Joining Marian Poe and Bertha Douglass, Inez was one of three black women practicing law in Virginia between the late 1920s and 1960.

Supporting paragraphs: Edward G. Walker David Walker (abolitionist)
Answer: David Walker