The letter included this fact that stuck in Eratosthenes' mind, and the fact was that the writer said, at noon on the solstice, when he looked down this deep well, he could see his reflection at the bottom, and he could also see that his head was blocking the sun.
La carta incluía esta información que quedó grabada en su mente, el escritor dijo que al mediodía en el solsticio, cuando miró dentro de un pozo profundo, pudo ver su reflejo en el fondo, y también pudo ver que su cabeza bloqueaba el Sol.