It is 0700 and I figure it is about 86 hours since the yeast was pitched (1700 Monday). The closet has dropped to 61 ºF after reaching a high of 65 ºF. The head on the beer is gone. Looks like the primary fermentation is done. I should probably dig out my "thief" and take a sample.
Mine is a clunkier, over-sized version, but it will do the trick.
a.d. IX Kal. Mar.