I was still feeling really uninspired, so I ended up making a digitally-edited painting based on this old public domain photo by Reuben R. Sallows. And the Wikimedia Commons page seems to have been updated since I made the painting (or possibly, there are multiple versions on it or something) because I’m pretty sure that the version I saw back then said that the photo was from 1908, rather than “Date unknown”…
As usual, this painting is released under a Creative Commons BY-NC-ND licence.
“1908 Photo Study (After Reuben R. Sallows)” by C. A. Brown