I'm trying to identify the man in the attached image, which is a photo of a photocopy of a painting that my late grandmother's first cousin, who was immersed in family history, told her descendants depicted "a great-grandfather" in our shared family line. I'm sure she said more than that but they didn't retain anything more and nothing is written on the photocopy, including the location of the original portrait. To be clear, my gran's cousin did not have the original herself. She only had the photocopy.
Assuming she was right about our relationship to the sitter, and given that he appears to have had means, our best guess is that he is Thomas Chadwick J.P. (died April 1895, aged 72) of Urmston, Lancashire, who is commemorated in a marble mural tablet in St. Clement's Church, Urmston, where his wife is commemorated in a stained glass window. But none of my online searches (whether for his name, or via reverse-image search) can confirm this identification.
Does anyone have any suggestions about where to look? I'll cross-post this to the Lancashire forum, just in case.
