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 lettre racontait une anecdote qui a marqué Eratosthène, l'auteur disait quà midi au solstice, quand il regardait au fond de son puit, il pouvait y voir son reflet, et il pouvait aussi voir que sa tête bloquait le soleil.