I never heard Gordon Childe lecture, sadly. He committed suicide, I think it was 1957 or '58, I think I may have caught sight of him once in the Institute of Archaeology in London when, as a schoolboy collecting coins, I used to go to the annual meeting of - of the British Numismatic Society. They used to hold a conference and that was an interesting experience and that happened to be held in the Institute of Archaeology in Gordon Square, but I never met Childe, but his book, "The Dawn of European Civilisation", was published in 1925 and really from then on became the basic text particularly for the Neolithic and early Bronze Age of - of Europe, and I became more and more uneasy with the general theme that the things that happened in Western and Northern Europe were in a way the result of what had been happening in - in the East Mediterranean and in the Aegean, and he had a position which could be called a diffusionist position, the diffusion of civilisation from civilised lands, Egypt and Suma, the sort of spread of civilisation to the Aegean and then outwards. He used to speak of the - the - the irradiation of European barbarism by Oriental civilization. And so that was his general position and he'd really written this book, "The Dawn of European Civilisation", with that as a central theme. The book had gone into a number of editions, which had had lots of updates, and the most recent was, I think, in 1956 or '57, but the general theme still underlaid the book and when I'd been in - in Spain, I'd come to doubt the megaliths of Western Europe were derived from the Aegean which was the generally held view, it was a view that - that Glyn Daniel had put forward in 1935.