1889: Warm Springs Indians request Jargon-speaking agent
At the end of the frontier era, Chinuk Wawa was still an important tool.
Here’s an example from Crook County, Oregon:
We have been informed that the Indians at the Warm Springs agency have signed a petition asking for the appointment of Mr. J.C. Luckey to act as their agent. It is said that every Indian on the reservation signed the paper. Mr. Luckey is well acquainted with the habits, manners and customs of these Indians, speaks Jargon fluently, and would make an excellent agent.
— from the Albany (OR) State Rights Democrat of January 11, 1889, page 1, column 5