What is written in the newspapers that helps Holmes to solve the mystery explain

Somebody had used news type to construct the following, "As you value your life or your reason keep away from the moor" (167). Only the word "moor" has been hand-written. From the typescript, Holmes quickly figures out which newspaper the words were taken from, but also from which article, and in fact determines that the words were cut with nail scissors. He also deduces that the creator was an educated man trying to look uneducated.