I have uploaded a spreadsheet version of the GURPS timeline at the GUPRS Timeline page - my intention is to amend that spreadsheet with corrections and info from the notes to form a definitve list
It would be interesting to have 3 timelines. The GURPS one, one that has references directly from Andre's solo works only, and a third that attempts to reconcile the two and include all other Witch World stories.
Yes, I was thinking on those lines - a pre-1989 (before GURPS & Songsmith) one should be fairly easy to complete with all the work done to date - the others may be a bit more of an issue!
I think my timeline http://elwher.wikidot.com/timeline-years might work as the third. I have been trying to work both GURPS and Norton years into the timeline - even works like Songsmith which cause some issues. I can't work everything in. Some short stories mention the war in the Dales as lasting 'a score of years' and that's simply not possible.