I decided to make a run into the Pontifical Institute of Mediaeval Studies library today for some last-minute digging. To my delight, I found a number of interesting references on mitigation of penances and regulations for marriage and ordination. Raymond de Peñafort's Summa de penitentia and Summa de matrimonio yielded several passages (many thanks to Ms. Melissa!). El matriomonio en la summa Breves dies hominis also turned something nice up.
There are a lot more references to furiosi, which is moderately frustrating. At least I can draw some conclusions from that, because often they qualify furens. And Grosseteste's Templum Dei does use the word imbecillans, so it's not too rare.
The problem of insanity versus impairment is causing me no end of headaches, and even I will be interested to see how it gets sorted out. Fortunately, the references I found today should help.
My first public lecture is on Thursday. I'm kind of terrified. The most interesting thing, though, was that I sat in that little cubicle for two hours and felt like a few minutes had passed. I was not distracted or even tempted to be distracted. Flipping through Latin penitentials was fun!