In 1912, Abdu'l-Baha spent some time in Denver. He stayed in the home of a local Baha'i. Now I have received an email from the great granddaughter of Abdu'l-Baha's hostess, while he was in Denver.
Here is the statement that I found in my email:
"My most prized possession is an autographed photo of Abdu'l-Baha which was given me by my Grandmother, who received it from my Great Grandmother. I cannot give it up."
In that same email, the great granddaughter relates the story of a time when she wanted to display a picture of Abdu'l-Baha, but she did not have a picture to display. She drew her own picture, using the image that she had developed after hearing stories from her relatives. Friends told her that it was an excellent likeness.