I guess I need to get a picture up. Is there an option for that here?

I purchased a painting at an estate sale in Nashville in the early 2000s which was described as a painting of Noble by "unknown artist." It measures 9 1/3 by 12 1/2 inches and is oil-on-board.

The signature at the base is faded but seems to begin with "E. H." so I have assumed that it is Edward Potthast. I cannot find the item in any catalog or database but need to get it identified as a Potthast. Any suggestions?

Thank you.