This is very sad news: Horst was a personality which profoundly influenced the development of category theory. Even before meeting him personally I was enchanted by his lecture notes on topological reflections and corelfections. And a couple of years later during his visit in Prague we started an intense collaboration that lasted over thirty years. His enthusiasm and his broad field of knowledge and interests was a great source of energy and inspiration for people around Horst. And at times of isolation in the seventieth and eightieth in socialist Prague Horst's visits had a tremendous impact. I will never forget the years of writing our joint book with George Strecker- before email in Prague and with every letter checked (for weeks) by secret police... Typically for Horst during his illness he was spreading jokes and pieces of information among his friends, never mentioning any of his problems. This is why the news of his passing has come completely unexpectedly. This is a great loss for me. Jiri Adamek xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx alternative e-mail address (in case reply key does not work): J.Adamek@tu-bs.de xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx [For admin and other information see: http://www.mta.ca/~cat-dist/ ]