Albert Anastasia was nicknamed the "Mad Hatter" and the "Lord High Executioner". The lord high execution was obvious but I was stunned by "the mad hatter. I found the definition in a book " The Complete Idiot's Guide to the Mafia By Jerry Capeci.

Mad hatter suggested that he was crazy, like the character in Alice in wonderland. Mad hatter comes from the practice of using mercury in the making of hats.Constant contact with the substance damaged the brains of the workers.