Final answer:
The question about civil prisoners requiring separation by correction law cannot be definitively answered with the provided references, as they do not specify conditions for separation. The references do discuss the prohibition of cruel and unusual punishment under the Eighth Amendment and due process rights.
Step-by-step explanation:
According to correction law, there are certain mandates about the treatment of prisoners and conditions of incarceration to ensure that they are treated humanely and their rights are respected. However, this particular question, which appears to be about the circumstances under which civil prisoners must be separated, requires specific legal knowledge that is not provided in the given references. The Eighth Amendment of the United States Constitution states that 'Excessive bail shall not be required, nor excessive fines imposed, nor cruel and unusual punishments inflicted,' outlining basic rights but not giving specifics on the separation of civil prisoners.
From the information provided, it is evident that cruel and unusual punishments such as mentioned in the quote from Peter Kropotkin's 'In Russian and French Prisons' are outlawed. The practical application of laws ensuring prisoner separation for different categories of prisoners (civil, criminal, or otherwise) depends on the jurisdiction and the specific correctional system in place. The question also touches upon due process rights under the law, as shown by another provided reference outlining protections against double jeopardy and self-incrimination.