1873, OR folklore: Earliest known version of the “sitkum dolla” joke?

I think we may have just antedated the classic Pacific NW “sitkum dollar” joke by 24 years!

It’s a crime to explain a jest…which I’ll do after you get a chance to read this & see if it makes you laugh:

A friend tells us a good story on Capt.
Whyte, of the Forward. While at Astoria a
clootchman stepped up to him and presenting
to his notice a basket full of crabs, offered to
sell the lot for sitkum dolla — half dollar. The
Captain planked down a dollar and took six
remarking that ‘It was a mighty high price.’
He hadn’t got the hang of Chinook jargon
evidently.

— from the Portland (OR) Morning Oregonian of September 4, 1873, page 3, column 2

Captain Whyte is represented as misunderstanding sítkum dála to be an offer of ‘6 a dollar’!

Comedy gold, because it’s from my home territory.

qʰata mayka təmtəm?
What do you think?