Thanks, all. Yep, my dad. He's gone.

He was nonresponsive when I called (I'd spoken to him the day before) - my mom put the phone to his ear and I just told him I was sorry he'd had to suffer so badly and that I wished him peace.

Had a good conversation with my sister today. I'm crying more than I thought I would - she said the same thing, and we both agreed that it's not important that we don't know why, but just to go with it and not shut the feeling down.