He's the only Chapter member that I talked "math" with. He was still writing graphing apps for the TI Graphing Calculator last year. In the Sierra Club he pushed me to do things... like go to the Club's Board of Directors meetings when he was entitled to represent the chapter, and afterwards we would talk about what I saw and heard and how it might affect the chapter. But for everyone, his outstanding Conservation Newsletters were the issues of the day distilled, and a record of what the Chapter was doing in conservation, when the Southern Sierran couldn't cover everythiing.