The word has just spread that Derek Brewer died last night.
For those who don't know who he is, here is a rather understated biography of him. In addition to his own academic work, he also supported medieval studies through publishing and editing with Boydell & Brewer. Even if you aren't an academic, if you've got an interest in medieval studies, you've got a Boydell & Brewer book on your shelves somewhere.
In the e-mail that came around, Elaine Treharne called him "one of the greatest medievalists of our age." That's no exaggeration, but like so many of the truly great, he left behind an infrastructure that will survive him. We'll still benefit from his work for many years to come.