Hello Rob Re: Pieter Paulus DE BLOK married to Catharina LANSUE. This is Hettie and I am surprised to see this very old message.Van Deursen is my married name and De Blok is part of my husband's stamboom. Ik heb niet zo veel meer erbij. Ik heb one Descendancy Chart of Frederik De Blok and one with an Ancestors list of Maria Adriana de Blok. How can I send these to you? Hettie