David Alan Walker Emeritus Professor of Photosynthesis , in the University of Sheffield In the UK, when university professors get beyond a certain age and usefulness they are put out to grass, like ageing horses. The term 'emeritus'; is a polite way of saying that they are past their sell-by date. So, when I can, I live here in Upper Coquetdale, overshadowed by the Harden Quarry I live a precarious existence, pitched between NE65 7DT and S10 3RW. As I approach my 80th birthday my contacts with the Department of Animal & Plant Sciences and The Robert Hill Institute become increasingly tenuous but those with Hansatech Instruments,Oxygraphics and, more recently, with Peerless Publications are as strong as ever. David Walker, December 21st, 2007 Phone +44 (0)114 2305904 d.a.walker@sheffield.ac.uk "The Worldly Hope men set their Hearts upon Turns Ashes--or it prospers; and anon, Like Snow upon the Desert's dusty Face, Lighting a little hour or two--is gone"