Below are some of the best pictures of John Owen available on the Internet.
The first three come from Zach Franzen’s excellent Illustration Blog. See John Owen Underpainting, John Owen, and his gallery (scroll down).
The next two come from the Wikipedia article on John Owen. See John Owen by John Greenhill and John Owen Frontispiece.
I’m not sure of the sources of the others. If you’re the source—or know the source—I’d be happy to give the appropriate credit. Contact me and let me know.
If you know of any other pictures of John Owen (that aren’t merely copies or cropped versions of these), please contact me and let me know.