Well, at the same time, I was a assistant, scientific assistant at the university because Heini Hediger had a university department on animal psychology at Zurich Zoo, so I kept these two positions. And I changed position only after retirement of Heini, in 1974, when I became a curator of mammals and birds. And as with registrar, I was the first person held in this position. I was the first person holding the position of curator of mammals and birds in Zurich Zoo.