Author Jimmy Akin - On May 13, 1917, the three were again tending their sheep when they perceived what they thought was a flash of lightning. As they hurried home, there was another flash, and they beheld a beautiful woman in a hemlock tree that grew in a field known as the Cova da Iria... “We beheld a Lady all dressed in white. She was more brilliant than the sun and radiated a light more clear and intense than a crystal glass filled with sparkling water, when the rays of the burning sun shine through it”