Grandpa Dunkley and President Benson

My friend sent this picture to me 2 years ago and I'm just now putting it on the blog! This picture shows the first 6 stake presidents of the Boise Idaho Stake.  They are (from bottom left to right, then top left to right):

Ezra Taft Benson
Z. Reed Millar
Charles O. Dunn
B. Clair Johnson
William K. Dunkley (My Grandpa!)
Weston H. Laney
  

I believe (but am not positive) that the photo was taken when the then president of the quorum of the 12, Pres. Benson, came to Boise to set-apart Wes Laney as the stake president.  I don't know the year.  I'm guessing late 70s.  My Grandma Dunkley and President Benson are cousins.