My wife told me that she had bought a heron the other day. She said that it would stop the seagulls eating the goldfish in the pond. I tried to understand why she had done such a thing but decided not to question her decision. You see she had not been herself for some time and this was just another instance of her increasing eccentricity. It had come on quite suddenly when she had turned fifty and there had been a marked change in her personality. I put it down to the menopause at first but then her mood swings became more extreme. One minute she would be smiling and laughing, the next she would burst into tears and say that she did not…