I have been asked what I meant in describing my sense of ‘the loss of the purest pursuit of knowledge across frontiers’ on entering the portals of the Warburg Institute. I realise that the wording of my comment may have been ambiguous. What I meant is that owing to a lifetime of working in museums, I have been not been able to spend the time as I would once have liked devoted ‘to the purer pursuit of knowledge, as represented by the Warburg. By chance I have been reading the letters that Kenneth Clark wrote to Gertrud Bing this morning in which he mourns the fact that, when the Warburg came to London, he had ‘looked forward to spending a considerable time at the Institute working on the Classical Revival, but I find myself more and more forced into a life of action’; or the same thought over twenty years later, ‘I have feelings of particular piety for the Warburg Institute, and I much regret that I have not taken advantage of its presence in England in the way I hoped to do. Partly through what is known as public work, and partly I suppose because I have not been able to keep down the buried actor in me as well as Warburg did’. I feel much the same, leave aside the actor bit.