What is known about witchcraft in the Hartz Mountains Saxony area?

There is some evidence of Phantom Hunting Dogs. these Phantom Hounds are quite loud, and their baying or barking is claimed to be audible in the mountains for great distances. The subject irks of the supernatural, but is briefly hinted at in William Corliss book on unusual natural phenomena and it is unexplained. May have someting to do with the so-called Wild Hunt, as dogs are used in hunting.