"[3] They spoke Shasta Costa dialect of Tututni (also known as Lower Rogue River Athabaskan) language.
One of their villages, Tlegetlinten, was located near Agness, and was eventually "occupied by Euro-American settlers.
The military sent Lieutenants John Chandler and John Drysdale with seventeen men to the fork of the Illinois and Rogue Rivers to persuade the "Shis-ta-koos-tee" ... band to leave their settlement and move to the coast to avoid further disruptions between miners and Indians.
According to Beckham, "When the young lieutenants were not able to induce the peaceful bands to leave their plank houses for the uncertainties of life near the white settlements, the troops fell back to the towns at the mouth of the Rogue River.
[7] The descendants of the Shasta Costa are now a part of the Confederated Tribes of Siletz.