"Might as well destroy all history books........"
Actually, Nothing  BTT, I'd encourage you to read some Oregon history and learn more  about Joseph Lane.  Among those  books I'd suggest are:
James Hendrickson, "Joe Lane of Oregon."  A well balanced, scholarly work.
R. Gregory Nokes, "Breaking Chains, Slavery on Trial in the Oregon Territory."  A recent and quite critical view of Lane and slavery.
Barbara Mahoney, "The Salem Clique, Oregon's Founding Brothers." Also very recent, puts Lane in context with Deady, Bush, Nesmith, Applegate, etc.
Additionally, Mathew Deady's diary lists Lane 16 times with some often pertinent insights.  Finally I'd suggest that the two articles on Lane I wrote in my  own Lane County history book include other unique material on Lane's life in the Umpqua and his final, active years there.