What is the oldest written source in this country that mentions this right?

Saint Lucia

Chapter I, Protection of Fundamental Rights and Freedoms, of the 1978 constitution immediately grants every person in St. Lucia “protection for his family life, his personal privacy, the privacy of his home and other property and from deprivation of property without compensation” (Constitute Project, “Saint Lucia 1978”).

https://constituteproject.org/constitution/St_Lucia_1978?lang=en

Privacy Rights · Country sources (all rights) · Years mentioned: 1978 · Last edited 2022-12-28 · Edit on GitHub