D-2 and I worked for 2.5 hours this morning, beginning at 8:30. We're on the adrenal gland. Our second day on adrenal. Every sub-subject of the complex endocrine system is complex. We spent four hours--we've done more--on adrenal yesterday and were mentally exhausted, our brains overloaded and unable to absorb more. When I dropped Ana off yesterday she was inclined to take today off because she was going condo hunting with my (second) ex-wife. I said to her in the car, "Honey, whatever you want, but if we take even a day off we're going to have to do this [adrenal] all over again. It hasn't come close to sticking." "You're right. That's true", so we studied today early. 

This is the first time we have ever done a full work week, five days without skipping one.