[tsavo]

Having written a few papers using a similar effect. While I may thoroughly research when fully awake, I would wait until exhausted to write observations. Falling asleep while writing, I would continue to write in my sleep. You can see in my notes the moment I fell asleep as my handwriting style would change and still be legible. When I'd wake up, I wouldn't remember everything I had thought about but it'd still be in my sleep notes.