We have no information on Paul Benson except this photo in the Hunter album.  I did find someone by that name living with his Danish-born parents living in Grant Township, Page County, in 1925, so my best guess is that he was a neighbor and friend of both the Hunter and the Tunnicliff families who lived in Grant and/or Morton Townships then.
photo from Hunter/Tunnicliff Photo Album: Merrily Tunnicliff