 Nyora kupfuurira kweiyi ndima - The Northwest Boundary Survey 18571861 yakaisa muganhu wepasi. Zvisinei, muganhu wemvura hauna kugadziriswa kwenguva yakati. Pashure peHondo yeNguruvemuna 1859, kutonga muna 1872 kwakagadza muganhu pakati peGulf Islands neSan Juan Islands. 