Stunning pastel and charcoal painting on board of William Samuels Barth

About the painting:

• Painting of William Samuels Barth
• Circa 1885
• Oval shaped in frame. No back.
• Pastel and charcoal on board
• Size: 22 3/4" x 16 3/4" x 1"
• Name and location written on back in cursive:  William Samuels Barth, Marion, Illinois

My research shows this about William Barth:

• Birth: April 1860, Illinois
• Occupation: Undertaker