The Cahuac Cycle is a collection of very short stories that are among the earliest I wrote. Not the very oldest, but they were written before I had started to take short fiction seriously.
They had their origins back in he late 90s from memory – I was taking part in an pbem worldbuilding game/exercise. We each made up a culture in a earth-like world, starting in the stone age just before hunter-gatherers began to settle down and each 100 years we explained what had gone on in the culture, what changes and happened and so on. Farming was discovered, plants and animals were domesticated, settlements started to appear, and so on. It didn’t last too long, maybe 20 turns in, but the culture I had developed had spread and split up and interacted with neighbouring cultures.
As part of it, I came up with a few stories as told by the people of that culture that were creation myths and legends of their people, about how things came to be, revolving around one legendary ancestor-hero named Cahuac. They were fun to write and a little bit different, a bit of worldbuilding that I later tried to fold into another project that some day might see the light of day.