I guess a lot of these old stories are likely handed down via word of mouth over the centuries to pass a story onto the next generation, so its pretty much a very long game of chinese whispers but its likely only been in the last few centuries that humans started writing down many of these stories, such as Little Red Riding Hood, Snow White, ETC.... When it comes to the stuff by the Romans, its likely many of these stories have been lost to time or waiting somewhere to be redicovered, but I know one thing for sure that the Romans gave the world including America is: CATS, they started off in Africa and decided to make us humans their pets/staff, between Egypt & the Romans, cats conquered the whole world aside from the South & North Poles, but that is understanable as they tend to like warm places!