Henry Jonathan Biddle expedition in Montana, 1927.
Here is an old movie my Aunt Helene Biddle Dick had. We sent it away to be digitized. The file name had "1927 Montana," but it may feature other places in the Pacific northwest such as Washington, southeast Oregon, and Idaho. He seemed to enjoy driving about and making films: libweb.uoregon.edu/speccoll/photo/fbiddleTrip.html
Henry Jonathan Biddle is my great great grandfather.