(though really it’s Thursday!) “Oregon oddities and items of interest” by the Federal Writers’ Project (Or.) ca. 1930s. Series 1, no. 3, About prehistoric Oregon. http://ow.ly/ruEmb
Some highlights: The Gazette-Times of Corvallis, September 4, 1924, reported a farmer had uncovered with his plow a large circle of symbolic stones shaped and placed by prehistoric man in a field on a hilltop near Salem; the tusk of a mastodon was exhumed near Arlington in 1923. It was whole when found, but became broken in several pieces by inexpert handling; In 1851 stone seats were found on the top of an uninhabited mountain; In 1893 a basement for the new postoffice building at Albany was excavated, and bones of a huge animal were found. In the opinion of Prof. Coudon, they were bones of a small elephant which lived in Oregon during the Champlain period.