There was a television programme, Stephen Fry on bipolar disorder. My first wife had this illness and so I watched – I thought it was good, a celebrity using his status and charm and remarkably his honesty about himself. Just when it was most interesting to me, Fry talking to Rick Stein about what it meant to have this illness in the family – Stein’s father had dived off the Cornish cliffs near their home - I heard Anna calling out and had to go. And I thought – with Alzheimers you can only have one thought at a time, one preoccupation. The complexity of life has to be reduced to a single plane.