5 nights through, fell asleep in the early afternoon of the 6th day and slept through til the following morning - at least, that's when I stopped writing in my diary. I kept an insomnia diary, where every hour I'd write out the alphabet in capitals and lower-case, then a little summary of how I was doing. It was dull as hell the first couple of days, then my alphabets started skipping letters, and then growing new letters - repetitions, greek characters, other strange symbols I didn't recognise and what I believe to be a stick figure of a giraffe that cropped up surprisingly regularly after midday of the 4th day. I don't remember the last day and a half or so, but the entries got a little spacey about 3 days in and by early morning of night 4 I'd devoted some time to describing small elves that lived in the skirting, emerging when the light was switched off to remove all the furniture and stack themselves in its place to make me think it was still there, then replacing the furniture and hiding when the light came back on. There were also references to a cheshire-cat type entity, with whom I had conversations, but there's no mention of when it appeared or whether I knew it wasn't really there.