A Grain As Big As a Hen's Egg, livre ebook

One day some children found, in a ravine, a thing shaped like a grain of corn, with a groove down the middle, but as large as a hen's egg. A traveller passing by saw the thing, bought it from the children for a penny, and taking it to town sold it to the King as a curiosity. The King called together his wise men, and told them to find out what the thing was.