They [the people he was travelling with from Berlin to London ] were photographers. And on the frontier with Holland, the Germans instituted a thing called “Eine Stichprobe”. It was a [random] sample- search of people who they thought might be smuggling, who were taken off the train. The train departed without us, so I – because I was in their care – was held back on the frontier while they went through a twenty-four hour search procedure. So I actually got onto the train on the following day. But being held back by the Nazis was, even for an eight-year-old, pretty scary.