Well, so far, I'm really puzzled. The leaves have remote shapes of ginko but they are different.
They look like Mulberry but most mulberry have small points at the tips and I don't know how far north Mulberry grows. The fruits (?) look a bit like mulberry but not red mulberry. Might be white mulberry. Then again ..........hmmm-m. I need a different book.
Hope somebody else has a better idea.