You create a mnmonic story as a way to memorise information. At a peg loci location, you might imagine a farmer throwing a banana at a dinosaur; and that would mean something to you (this is just an example - I have no idea what it might mean to you!).
When you come to recall the facts, you imagine your peg location and hopefully you recall the farmer doing an action to the dinosaur. The action is as important as the objects because it probably means something and it helps to bind the overall story together into something memorable.
Maybe there is a system of 12 actions where each action represents a month of the year (April); so maybe the farmer means the 10th and the dinosaur means 2002AD; and the overall story means the date: the 10th April 2002.
I wrote a system once which had 1000 actions in it. I am writing a replacement system which would use useful dictionary words as its actions rather than the 'anything will do' approach I used in the original system.
I hope that it will be finished and ready to publish, some time before 2025. It is part of a wider project to do with learning vocabulary. I like the idea that a student would know a memory system of over 1000 common words; and then, when learning a foreign language, these already known images would be imagined in stories where the spelling or sound of the foreign word is somehow visualised.
Moreover, for some reason, I like studying languages or linguistics. I am intrigued by the question of which minimum vocabulary people could use to be understood. For instance, if you could use a maximum of 2500 words in a language, which words would be essential and which words would you dismiss?