Keywords: Cosijn.jpg en Petrus Jacobus Cosijn 1840-1899 professor Old-German and English in Leiden before 1899 Icones Leidenses 287 Digital Special Collections Leiden University http //socrates leidenuniv nl Jan Veth 1864-1925 PD-old-100 Uploaded with UploadWizard Icones Leidenses Pieter Jacob Cosijn Rectores magnifici from Leiden University Jan Veth Photographs uploaded by User Vysotsky |