I agree with Fred and Marco. Keith Hardie was one of a vanishing breed of true gentlemen. When I visited Cape Town in the early 1980s, we discovered we had a common interest in diagrams of interlocking sequences (so called by TCT (Terry) Wall). Keith’s interlocking sequences arose from homotopy groups, mine from homology. He kept encouraging me until I wrote up a result I had while writing, but did not include in, my thesis. I really enjoyed revisiting that result and improving some techniques. That first visit to South Africa and an evening at Keith’s home left a lasting impression on me. We only met a few times after that, the last being CT2009. It is very sad news, Peter. Please convey my condolences to the family. Ross [For admin and other information see: http://www.mta.ca/~cat-dist/ ]