Here is a link to the 1951 recording made for the Seattle Centennial series Their Name Was Courage which is a dramatization of the colonization of the Seattle region. https://soundcloud.com/paul-nunn-604692201/dream-of-an-american
https://historylink.org/File/3632
Time capsule that I believe contains a 78 record with this recording in it will be opened in 2052, says the last sentence in this blog report.