Answer:
The judge is relying on Stare decisis law, also known as Common law.
Explanation:
Stare decisis can be understood as a legal doctrine that takes the help of any historical cases in order to solve and execute the punishment of similar cases in the present as well as the future. This is sometimes also referred to as common law, as this too utilizes the same principle for the execution of punishment. Here, the historical case of Mark Twain v. Steamboat Publishing is taken into consideration while making the decision on the similar case of Edgar Allan Poe against his publishing company.