I was very shocked to hear the news about Sean. He was a valued friend since the early '80s, and his passing is a sad loss to humanity too - because his presence brought the value of humanity up several notches. His kindness, altruism and keenest to help wherever he could were unsurpassed and I feel extremely privileged to have known him - I shall always miss him. I am donating because that is the one thing that Sean himself (being logical and practical) would have considered to be the right thing to do. Sincere sympathies to Tamasin, James and Thomas - take care all of you.