Chapter 5! And a new mishnah: A non-Jew who hires a Jewish worker raises question as to whether that Jew can accept his wages -- depending on the terms of the entire capacity of the job. For example, when there are mitigating factors to reduce the stringencies towards the idolatry. Also, the prohibitions that are rabbinic in nature - are often reduced, or certainly debated. Also, disposing of the problematic items - in such a way that they cannot be unearthed or reused. Plus, a cemetery that was used for those killed in capital punishment -- what else that might be buried there should be burned.... Plus, the economic question of Jews dealing with non-Jews, given stringencies.