The term 'HISTORY MUSE OF' is solved by the crossword answer 'CLIO', which is a four-letter word. CLIO is the Greek muse of history, who was one of the nine daughters of Zeus and Mnemosyne. She is often depicted with a scroll or book in her hand, representing the recording of history. CLIO is also known as the Proclaimer of Heroes, as she was believed to have inspired the great heroes of ancient Greece.