The year 1187 marked a major watershed in the history of the Crusader States as Jerusalem and the southern half of the kingdom were conquered by Saladin. In seeking to learn more about the history of this turbulent period we are forced to rely on a body of complex source material, some of which appears as additions to the chronicle of William of Tyre. This week's host, Marco Damiano, introduces us to one of the most valuable of these texts, the so-called "Lyon Eracles". Join Marco as he explains why this text so important, and how it came to contain such a valuable account of the period in question.