He subsequently went back to the Netherlands to become Curator of Birds at the Rijksmuseum in Leiden until his retirement , for which he returned to Western Australia in 1991 .
He subsequently lived in Perth and Northcliffe .
He subsequently went back to the Netherlands to become Curator of Birds at the Rijksmuseum in Leiden until his retirement , for which he returned to Western Australia in 1991 , and lived in Perth and Northcliffe .