The most deeply and continuously dividing issue in the Northwest, as in the nation at large, was negro slavery. Although written by Southern men, the Ordinance of 1787 stipulated that there should be "neither slavery nor involuntary servitude in the said territory, otherwise than in the punishment of crimes whereof the party shall have been duly convicted." If the government of the Northwest had been one of laws, and not of men, this specific provision would have made the territory free soil and would have relieved the inhabitants from all interest in the "peculiar institution." But the laws never execute themselves--least of all in frontier communities. In point of fact, considerable numbers of slaves were held in the territory until the nineteenth century was far advanced. As late as 1830 thirty-two negroes were held in servitude in the single town of Vincennes. Slavery could and did prevail to a limited extent because existing property rights were guaranteed in the Ordinance itself, in the deed of cession by Virginia, in the Jay Treaty of 1794, and in other fundamental acts. The courts of the Northwest held that slave-owners whose property could be brought under any of these guarantees might retain that property; and although no court countenanced further importation, itinerant Southerners--"rich planters traveling in their family carriages, with servants, packs of hunting-dogs, and trains of slaves, their nightly camp-fires lighting up the wilderness where so recently the Indian hunter had held possession"--occasionally settled in southern Indiana or Illinois and with the connivance of the authorities kept some of their dependents in slavery, or quasi-slavery, for decades.