books.google.co.ukhttp://books.google.co.uk/books/about/Mnemotechny_or_art_of_memory_theoretical.html?id=ZiUAAAAAQAAJ&q=Dionysius+of+Halicarnassus&utm_source=gb-gplus-shareMnemotechny, or art of memory, theoretical and practical: with a mnemotechnic dictionary
