Portrait is scanned from an old family photograph, probably around 1950. It is stamped Jean Duval Studios, Fifth Avenue, New York City, so there might be records, which I will look into some time. I thought showing him as a young man would be a nice departure from the tendency to portray the departed in their old age. I do not recall ever seeing a picture of George Washington or Ben Franklin as a young man.
Unfortunately, this picture needs to be cropped a little better, but I do not have time to do it now, having only noticed after the update. Sorry about that. I will fix it before the memorial service on Saturday.
This update: 11:36 AM, EST, Wednesday, August 20, 2014.