I surfed into your post looking for Robertson in the Skagit board (and I was surprised that our first names are so similar!). My father-in-law's father's name was Charles Arthur Robertson (1884-1977) who lived in Conrad and Valier Montana. He moved to Mt. Vernon, WA abt. 1930 so I don't know if he is the C A Robertson that was Bert's pallbearer. But I had to write because of the name coincidences!