I did check with our local newspaper "The Skagit Herald" for obits for both Johanna and Swan but I did not see anything listed. For more in depth information, you would do well to contact the Skagit Valley Genealogical Society http://xanadu.ncia.com/~svgs/

They have infinately more resources than I can offer you and they are in a much better position to be able to fulfill your requests.