One of Story's more vexing opinions was "Prigg v. Pennsylvania", in which he wrote for the majority in 1842. Story was forced to consider the constitutionality of a Pennsylvania personal liberty law which placed procedural requirements on those seeking to extradite fugitive slaves. Story, despite his hatred of slavery, sided with the southern justices to declare the Pennsylvania law unconstitutional. This appears especially hard to square with Story's anti-slavery philosophy, as one of the individuals kidnapped by Edward Prigg, the slave catcher in question, was actually not a slave at all. However, despite the outcome as appearing entirely in favor of the South, a more accurate assessment can be gleaned from the text and time period. Concerning the former, Story argued that fugitive slaves were addressed in the Article 4 Section 2. Despite the fact that slavery was not mentioned, Story concluded that it was all too clear that the clause was meant to secure runaway slaves for southern slaveholders. He went on to note, "The full recognition of the right and title was indispensable to the security of this species of property in all the slaveholding States; and, indeed, was so vital to the preservation of their domestic interests and institutions, that it cannot be doubted that it constituted a fundamental article, without the adoption of which the Union could not have been formed." Story's apparent endorsement of slaveholders' rights must be read through this light, that the justice felt that this was a bargain integral to the Constitution. Consequently, Story had an obligation to honor the deal struck at the Constitutional Convention. Further insight is provided by the political activity of southerners of the day. H. Robert Baker notes, "Story chose the path that he believed best supported a strong Union and rejected the natural right of slaveholders to the people they claimed as property. His resonating opinion answered southern constitutional claims in ways that protected slaveholders' rights, but not on the terms they wanted."