Thanks for that. I'll backup my driver with Magician.
Meanwhile I came across a surprising thing (to me) the driver comes with WinXP ! Not even Canon told me that - why not I don't know.
I was saying I don't know where I got the driver or what file it was - I don't know what made me so sure I got the driver but I was sure. But it looks like I didn't. It looks like WinXP provided it. Unless it is only in the list of available drivers BECAUSE I previously installed it. Would that be right or what?
That link you provided is for a driver for LBP4 and, it seems to suggest, for that list printers below the 'LBP4'. And that list includes the LBP8IIIR. So it looks good. But for OS they say win95, win98, so it's not so good. I gave it a miss.