[31] Constitution of Massachusetts, Part I, Art. 1; quoted by Du Bois, _Suppression of the Slave Trade_, p. 225. There is little to be said about the remaining group of states with which we are here concerned. Their territorial organizations were effected under the provisions of the Ordinance of 1787. One of the most important of these provisions is as follows: "There shall 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."[32] It was this feature, introduced into the great Ordinance by New England men, that rendered futile the many attempts subsequently made by Indiana Territory to have slavery admitted within its own boundaries by congressional enactment. "It is probable," says Rhodes, "that had it not been for the prohibitory clause, slavery would have gained such a foothold in Indiana and Illinois that the two would have been organized as slaveholding states."[33] The five states, Ohio, Indiana, Illinois, Michigan and Wisconsin were therefore admitted to the Union as free states. West of the Mississippi River there is one state, at least, that must be added to the group just indicated, namely, Iowa. Slaveholding was prevented within its domain by the Act of Congress of 1820, prohibiting slavery in the territory acquired under the Louisiana purchase north of latitude 36° 30', and several years before this law was abrogated Iowa had entered statehood with a constitution that fixed her place among the free commonwealths. The enfranchisement of this extended region was thus accomplished by state and national action. The ominous result was the establishment of a sweeping line of frontier between the slaveholding South and the non-slaveholding North, and thereby the propounding to the nation of a new question, that of the status of fugitives in free regions. The elements were in the proper condition for the crystallization of this question. [32] See Appendix A, p. 359. [33] _History of the United States_, Vol. I, p. 16.