This series consists of accounts of the Whitman killings written decades after the event, ephemera relating to people who had been at the Whitman mission during the killings, and items related to the later memorialization of the Whitmans. The exact provenance of this series' contents is unknown, though notes regarding the erection of a monument were likely acquired by Oregon Historical Society founder George H. Himes at the time, and may have even been addressed to him.