Update on my suspect: I received some photos

I have his chin and his cheeks and his nose and his forehead and his ears. His eyes, too, but he shares that with my mother. The resemblance is not breathtakingly striking, but it's there and it's real and it's haunting (I look quite a bit like my mother's family, too, and look NOTHING AT ALL like my social father).

I got these photos from the relative who inherited his house - she was his niece. He was her paternal uncle. Which, if the whole idea is true, makes her my first cousin and thus a very good candidate for a DNA test, right?

She'll be visiting in September and I'll probably be waiting until then to find out for sure.