2. I found a book by Bernarr McFadden http://en.wikipedia.org/wiki/Bernarr_Macfadden (can't remember the name right now) that correctly described my experience (it's hard to find descriptions at all; and everyone around has the anthonyb opinion that I'm about to die because I haven't eaten in x days). That book had very old references (from the '30s) about fasting practices in some indian castes - which I was then able to altavista (that was before Google hit the scene) and confirm
3. I consulted my doctor, and a friend who had finished his medical studies and was doing his internship at the time. Both had the immediate anthonyb reaction, but a few minutes later conceded that any of the things they feared would trigger horrible pains, blackouts, etc - and that couldn't be right as I was feeling good.
YMMV. 1) and 3) may not be available to you. 2) was available to me from the university library, but I'm not sure where I can find it today. But it was available to me at the time.