The reaction against the Negro was then well on its way in Louisiana and evidences of it soon appeared in New Orleans where their condition for some time yet differed much from that of the blacks in the parishes. Moved by the fear of a rising class of mixed breeds resulting from miscegenation, the whites endeavored to diminish their power by restraining the free people of color from exercising influence over the slaves, who were becoming insurrectionary as in the case of those of the parish of St. John the Baptist in 1811. The State had in 1807 and 1808 made additional provisions for the regulation of the coming of free Negroes into Louisiana, but when there came reports of the risings of the blacks in various places in the Seaboard States, and of David Walker's appeal to Negroes to take up arms against their masters, it was deemed wise to prohibit the immigration of free persons into that Commonwealth. In 1830 it was provided that whoever should write, print, publish or distribute anything having the tendency to produce discontent among the slaves, should on conviction thereof be imprisoned at hard labor for life or suffer death at the discretion of the court. It was further provided that whoever used any language or became instrumental in bringing into the State any paper, book or pamphlet inducing discontent should suffer practically the same penalty. Any person who should teach or permit or cause to be taught, any slave to read or write should be imprisoned not less than one month nor more than twelve.[80] Under the revised Black Code of Louisiana special care was taken to prevent free Negroes from coming in contact with bondmen. Free persons of color were restricted from obtaining licenses to sell spirituous liquors, because of the fear that intoxicants distributed by this class might excite the Negroes to revolt. The law providing that there should be at least one white person to every thirty slaves on a plantation was re-enacted so as to strengthen the measure, the police system for the control of Negroes was reorganized to make it more effective, and slaves although unable to own property were further restricted in buying and selling. Those taken by masters beyond the limits of the State were on their return to be treated as free Negroes. But it was later provided on the occasion of the institution of proceedings for freedom by a slave who had been carried to the Northwest Territory[81] that "no slave shall be entitled to his or her freedom under the pretense that he or she has been, with or without the consent of his or her owner, in a country where slavery does not exist or in any of the States where slavery is prohibited."[82]