San Antonio Conservation Society Letter to Land Heritage Institute Presnall-Watson Homestead San Antonio Conservation Society Letter to Land Heritage Institute. Read more. Presnall - Watson House / Land Heritage Institute Presnall - Watson House PhotosPresnall-Watson House/Land Heritage Institute – Introduction and HistoryArchitectural Descriptions of Buildings and StructuresArchaeological Sites Presnall-Watson HomesteadSan Antonio Conservation Society Letter to Land Heritage InstituteNational Register Application for Presnall - Watson Homestead (Redacted) ← Archaeological Sites Presnall-Watson Homestead National Register Application for Presnall - Watson Homestead (Redacted) → San Antonio Conservation Society Letter to Land Heritage Institute