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

Trinidad and Tobago

The 1976 constitution does not explicitly protect the right to privacy. However, Article 4 protects fundamental human rights, such as “the right of the individual to respect for his private and family life” and protection of the law (Constitute Project, “Trinidad and Tobago 1976 rev. 2007").

https://www.constituteproject.org/constitution/Trinidad_and_Tobago_2007?lang=en

Privacy Rights · Country sources (all rights) · Years mentioned: 1976, 2007 · Last edited 2022-12-28 · Edit on GitHub