“…In his presidential address in 1986 Bryan Wheeler (Wheeler, 1987) pointed out the importance ofthe sixteenth letter ofthe alphabet, the letter P in a presidential address given to this Society, Plant Pathology and President begin with this letter of course and publication, the publication of one's first research paper, and presentation, the presentation of one's first paper at a scientific meeting also begin with P. In my own case one could write the equation P = Attium white rot because my first paper published in 1958 was on this disease, so was my first presentation to the British Mycologieal Society a year or two later and now some 30 or so years on my presidential address is on the same subject. What I am really saying of course is that my principal reason for speaking about this today is that I have spent so much of my research career working on it and thinking about it.…”