Assertion details
Summary
oregon river appear 1 in the records of outsiders
1 triples in cluster
oregon river appear in the records of outsiders 1
1 source sentences
Source: Shown
Subject: Shown
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  • SRC The Willamette River first appears in the records of outsiders in 1792 , when it was seen by British Lieutenant William Robert Broughton of the Vancouver Expedition , led by George Vancouver .