It is likely that they are mnemonic devices that encode information. Read The Memory Code by Lynne Kelly for more information. It's one of the most interesting

It is likely that they are mnemonic devices that encode information. Read The Memory Code by Lynne Kelly for more information. It's one of the most interesting books I've read, right up there with The Art of Memory by Frances Yates. http://www.lynnekelly.com.au/the-memory-code/ http://www.lynnekelly.com.au/the-memory-code/