12 years. 12 years from the moment I entered university in 1934 and the moment... Did I say 12 years? 14... 13 years... December 1947, when I came back... January 1948, actually – came back to Louvain where, in the meantime, I had been appointed a lecturer... Chargé de cours, as we call it, in biochemistry at the medical faculty. Now, strangely enough I had got the job even though I was not the nephew of a bishop or the son of a professor. But it turns out that the Professor of Biochemistry – a man called Malengreau who was an organic chemist, as I said – had had... had lost interest in biochemistry, or even in organic chemistry, because he'd become involved in medical education, in what was then the Belgian Congo, so he started... he was very much involved in that, and he had a young man who was supposed to... to succeed him, as a Professor of Biochemistry at the university, and this young man was a victim of the war, not... in fact, he died of tuberculosis during the war, and so, again, this rather sad accident opened the job, and so the Professor of Biochemistry called my physiology professor and said, 'I understand de Duve is training in biochemistry; the job is open for him.' And so I got appointed.