Not being one to avoid the hard queston, I asked John if he'd had a stroke. Nope, he responded: when I was 31 I raced motor cars and took one risk too many. Totally his fault, he added.
We chatted about life choices over the intervening 41 years, he with his camera, me with mine, he with his chair, me with my cane. Two oldies road-testing d-SLRs in the manual setting, and struggling with layers of post-processing. Two oldies just getting on with the possible.
He is part of a research project to look into how people respond to catastrophic events. Why do some people condentrate on what they have lost, while others use what they have left to simply get on with it? John said that the black-dog can overwhelm at times, but the organism has a propensity to clang back to its positive trajectory.