Topic: The Forgotten Prompt

A long time ago, the first writer clanked out his first story on a cave wall. The words were merely pictures spread out across the rocky wall. But what was the prompt? Did he/she want to tell how to hunt or was it the brave conquest of a massive beast that the mighty warrior had felled? Or was it just a diagram for what creatures were good to eat? Hmm, the writer might have been the first chef writing his very first cookbook. Tell the story based on what you think was this writer's inspiration.