We had another trip to the Continent a few years later, in 1953, and my father was a great reader and I was very fascinated by the issue of the painted caves, which is your subject, Paul, and so we had the good experience of going to see Lascaux. And in those days if you went to see Lascaux you were shown round by one of the people who'd discovered it as a schoolboy only a few years before, early in the war years. And to see these extraordinary animals painted on the walls, it was romantic and mysterious, just as it still is rather romantic and mysterious. And then we went on to see some of the - the other painted caves, Font de Gaume, Les Combarelles, and then we went on down to Altamira, which I think my father must have known about, and heard again about the story of the discovery of Altamira. And so that was really an interesting experience and one which has always stayed with me. I haven't been back to Lascaux. I've seen, and, in fact, you've shown us painted caves and took us to Altamira not so very long ago again, but Lascaux made a huge impression.