| http://www.w3.org/ns/prov#value | - Further explorations of the straits were performed by Spanish explorers Manuel Quimper in 1790 and Francisco de Eliza in 1791, then by British Captain George Vancouver in 1792.The British-Spanish Nootka Convention of 1790 ended Spanish claims of exclusivity and opened the Northwest Coast to explorers and traders from other nations, most notably Britain and Russia as well as the fledgling United St
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