In the past I would probably have mulled them over for a while, hoping to remember them when I woke, but not last night. Having the notebook with me meant I could quickly scribble them down, get them out of my head, and get back to the business of sleep.
So now I have some raw material to work from and it's pretty good stuff to boot.
It felt good to get back to writing by hand again today, even better to finally flesh out the ideas I'd had almost three weeks ago.