But both that sign and the blue street signs contain errors, the writers of the piece Olaf Graeff and Jim Terlingen note. The Paulina van Crombruggehof, for example, is missing an ‘n’, because her name would be Paulina van Crombruggen. And Geertje Zijlstra, of the Geertje Zijlstrahof, was not born in 1913 and did not die in 1944 either. That should be 1907-1993.