Philadelphia’s preeminence as an historical hub of Underground Railroad activity, popularized through the exploits of William Still, is well established. However, a series of archival gaps have virtually erased Philadelphia, and particularly the early years of its fugitive slave court, from the wider historiography of the Fugitive Slave Act of 1850. This work attempts to re-center Philadelphia, as well as its white-led abolitionist organizations and its African American community, in the scholarly discussion over the Act’s origin, intent, and effect. Attempting to overcome archival limitations, this work reconstructs the city’s first fugitive slave court, overseen by Commissioner Edward D. Ingraham from December of 1850 until his death in November of 1854, through the eyes of its participants. Using a close-reading approach, this thesis considers Philadelphia’s resistance to both the Ingraham court and the Act in toto from three perspectives. By comparing the case of Adam Gibson (the first victim of the Ingraham court) to that of Henry Massey, a Maryland freedomseeker and the last person sentenced before Ingraham’s death, this thesis establishes a documentary baseline through which one can trace the court’s evolution across the opening years of the Act’s enforcement. Through recreating the personal and institutional histories of Commissioner Ingraham, the Pennsylvania Abolition Society, and the abolitionist lawyers who represented Gibson, Massey, and other freedomseekers, this thesis provides context to evaluate the legal, social, and religious moves made by the city’s elite in response to the Act’s passage. Finally, by drawing out indications of black organization and agency hidden within the internal records of the Abolition Society itself, this thesis attempts to delineate the practical limits of interracial abolitionist cooperation within Philadelphia at the time. Ultimately, this thesis finds that a combination of geographic pressures and ideological guardrails particular to Philadelphia prevented a stronghold of abolitionist outrage from forming an effective counter to the Act, even while comparable cities (Boston, Syracuse, Harrisburg) developed legal and illegal strategies for shutting down their resident fugitive slave courts.