Rowan W. Dorin, assistant professor of history, with the miscataloged parchments whose mystery he is working to solve. Credit: L.A. Cicero __________________________________________________________________________ When historian Rowan Dorin first stepped onto the Stanford campus in early 2017, he made it a habit to visit Green Library every week to dig through its collection of medieval documents and objects. After a few months, Dorin, an assistant professor of history specializing in medieval Europe, discovered something out of the ordinary. Three leaves of ancient parchment were labeled as a Hebrew translation of text about grammar, but its margins had Latin words like fish, capers...