Some additional sources of info on the game:
https://web.archive.org/web/20130419201423/http://…
http://www.cgwmuseum.org/galleries/issues/cgw_96.p…
https://web.archive.org/web/20070108205037/http://…
https://en.wikipedia.org/wiki/Ultima_Underworld:_T…
https://www.gamasutra.com/view/feature/129994/the_…
https://ytcropper.com/crop.php?ytURL=TpuTbxkaZ94
20 slides with game development and game rules and game map description. It should be a 8-10mins presetation