Heymans, Gerardus
born 17. April 1857 in Ferwerderadeel; died 18. February 1930 in GroningenBrief von Gerardus Heymans an Hans Vaihinger, 24.05.1920 [24.05.1920]
Groningen, 24.05.1920 [24.05.1920]Schoock, Marten
born 1614; died 1669Brief von Unbekannt an Marten Schoock, 22.06.1657
Leiden, 22.06.1657