Jas Casper, de Vader is Jan Casper Piek, Moeder Margareta Hartog. 23e Appril 1719.
See:
First Fifty Years - a project collating Cape of Good Hope records
A project to transcribe and publish copies of records relating to individuals who lived at the Cape (Cabo da Boa Esperança / de Caep de Goede Hoop / Die Kaap die Goeie Hoop) during the first decades of the settlement after 1652