That would be awesome if you could find it. Her name was Etta Louise (Salliotte) Nelson and she died April 21, 1921. She was buried in the family plot in Ecorse Michigan, but I am 99% sure she did die at home in Larchmont.
She was an actress and used another name on the stage. My mom thought it might have been Louise Lamont, but I've never been been able to confirm that and many of my moms memories proved to be erroneous. If she has an obit that includes her stage name it would open up a lot of avenues to learn about her career.
I've used Fulton History quite a bit and you're right. It IS clunky. I also found that when I downloaded the PDFs they didn't stay enhanced. But its still a fantastic resource. I found a lot on Etta's husband Edgar who was also an actor.
Thank you so much for your assistance.