Nine Southern states adopted vagrancy laws - which essentially made it a criminal offense not to work and were applied selectively to blacks - and eight of those states enacted convict laws allowing for the hiring-out of county prisoners to plantation owners and private companies. Prisoners were forced to work for little or no pay. One vagrancy act specifically provided that 'all free negroes and mulattoes over the age of eighteen' must have written proof of a job at the beginning of the year. Those found with no lawful employment were deemed vagrants and convicted. Clearly, the purpose of the black codes in general and the vagrancy laws in particular was to establish another system of forced labor. In W.E.B. Du Bois's words: 'The Codes spoke for themselves. . . . No open-minded student can read them without being convinced they meant nothing more nor less than slavery in daily toil.