Burr worked as a barber in the city of Philadelphia, and by 1818 had his own business, a whites-only barber shop in the front room of his home. He was an
abolitionist, and an active member of the
Underground Railroad in Philadelphia. As a free state, Pennsylvania had abolished slavery after the Revolution; it offered freedom to those slaves brought to the state voluntarily by their masters. In addition, as it bordered states of the Upper South, the state and its waterways became destinations for fugitive slaves. Burr would hide runaways in his house. Because Burr was of mixed race and light-skinned, he often accompanied refugees to their next stop in the city or environs. If they were questioned by police, Burr would simply say he was taking "his man" (personal servant) out for a walk. Burr was also an organizer of the
Pennsylvania Anti-Slavery Society, one of several civil rights organizations in which he was active. Burr served on its Vigilance Committee to directly aid fugitive slaves. Together with other members of the Pennsylvania Anti-Slavery Society, Burr helped raise money for the defense of men indicted for treason in
Lancaster County, Pennsylvania, for what was then called the Christiana Riot of 1851, now known as the
Christiana Resistance. The mixed group of blacks and whites had resisted
U.S. Marshals and slaveholders trying to capture fugitive slaves who had been living in southern Pennsylvania; this incident was part of popular resistance to the
Fugitive Slave Law of 1850. After the first suspect was rapidly acquitted, the federal prosecutor dropped charges against the other defendants. Burr's activities ranged from promoting emigration by American blacks to Haiti after it founded its republic, to serving as an agent for the abolitionist newspaper,
The Liberator, published by
William Lloyd Garrison in Boston and distributed nationally. He worked on civil rights, protesting disfranchisement of free blacks by the state legislature in 1838, and sheltering fugitive slaves. As chairman of the board of the
American Moral Reform Society, Burr helped publish its journal, the
National Reformer. He was involved in the National Black Convention movement of the early 1830s. Burr served as an officer for the Mechanics' Enterprise Hall, the Moral Reform Retreat (a shelter for African-American women co-founded by Hetty Reckless and Hetty Burr), and the Colored Citizens of Philadelphia. He worked with other leaders such as
Robert Purvis and Rev. William Catto, father of
Octavius Catto. With associates, Burr founded the Demosthenian Institute of Philadelphia at his home on January 10, 1837. First known as a literary society, its members trained young black men in their early 20s to prepare for public speaking, like a
Toastmasters of its time. They took turns preparing and giving speeches, discussed current political topics, and answered questions posed by fellow members. They intended the institute to be a kind of preparatory school until members gained experience and skills in public speaking. By 1841, the Institute had 42 members, and its library had collected more than 100 scientific and historical works.
The Demosthenian Shield, its weekly paper, was first published on June 29, 1841, with some guidance from staff of the
Colored American, an established black newspaper of the time. Organizers collected a subscription list of more than 1,000 persons to support the paper before its first issue was published. Burr joined the
African Episcopal Church of St. Thomas in Philadelphia, founded by
Absalom Jones in 1782 as the first black Episcopal congregation. Burr worked with Jones, who was ordained in 1804 as the first black Episcopal priest, to build the congregation's second church. Burr also helped develop the membership, among whom were many leaders in the black community. With his activities and leadership skills, Burr became a member of the elite class of free blacks in Philadelphia. He was among those who signed
Frederick Douglass's "Men of Color to Arms" poster for recruiting during the Civil War. He also met with members of the
Quakers, many of whom supported abolition, such as
John Greenleaf Whittier. The poet later wrote about Burr in his letters. ==Marriage and family==