He has a standard "Online Permission" sweetie that allows us to use his Art as long as we follow his TOU. (See below from his Website))
•DAVID PENFOUND•
May i please have permission to use your images in my group.
Yes you may, although the images on my website are protected by copyright please feel free to use them in a non-commercial way. I would appreciate a link to my website on your pages and please credit the work to me. I do however hold the rights to withdraw the permission at any time and the work would need to be removed from your site.