In this post I would like to highlight some intriguing research carried out and sent to me by Andrés Eloy Martínez Rojas, president of la Sociedad Astronómica Urania (SAU) in Morelos, Mexico, relating to folio f68r.  This illustration shows what he is suggesting as an interpretation:   You can find a report in Spanish here from a Mexican newspaper … Continue reading f68r – an eclipse in 1409?