In 1993/94, my lab technician wife packed two boxes of Kodak 4x5 b&w neg film. With her standard thoroughness she sealed them in multiple layers of plastic bags and heavily sealed them with tape. I've just found them. I cannot do anything with them, so I'm listing them for sale in the classifieds. Apugers who delight in wondering what-if, may wish to have a look in the for sale page.