'Mrs. Harold Alston' is on that page, as are a couple of dozen other Clark roses, and the quality of the shots is excellent. The photographer is a member here, and has licensed the images on that page as Creative Commons Attribution-Share Alike 3.0 Unported, so there should be no worries about using them.
Eric is a valued member of HelpMefind and contributes many photos. We'd rather he contribute them himself than us contribute his photos. I am sure it just depends on how much is on the plate at any one time.
The parentage of 'Sunny South' x unknown for the 1940 Alister Clark rose 'Mrs. Harold Alston' first appeared in 2003. Does anybody have an earlier reference to the parentage?