A tintype ghost. "A bad Victorianish" painted backdrop has through wear become a ghastly apparition over this bloke's shoulder!
I spent five years looking "behind the sitter" in every tintype I could find putting together my book titled "The Painted Backdrop" available in easy $5.99 ebook form, ahem, HERE. I still can't break the habit. Which is fine, as the backdrops are often far more interesting than the people. In this case, particularly so.
$5.99 ebooks by Jim Linderman available HERE.