[Seizethecarp]

If people of the same era write a cursive “n” in the same way it is proof of nothing more than that they learned to make “n” the same way.

I don't see any misspelling of Madlyn’s signature.

[little jeremiah]

One sig the small “n’s” lines do not all touch the line. The other sig’, all the “n’s” lines touch the line. It’s consistent in each of the top two sigs. And if a forger was that careful with the “n’s”, he’d have been more careful to make more of the sigs different.

That’s just my observation. I have no bias as to whether this is a forgery or not, I am no expert, and of course I’d like it to be genuine. But with no trail or provenance it probably is a forgery.