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This scroll is in the tradition of historical timelines popular in the 18th and 19th centuries. Copies can be found in 73 U.S. libraries including those at Yale, Harvard, and Princeton. It was printed in 1871 and then updated and reprinted twice more, in 1876 and 1878.
A photo replica is what is being shown at the Oregon Stat Library along with a second framed copy of a later edition. There's an extensive article in the Salem Statesman Journal .