For what it's worth, I don't find SAR applications very reliable.
I found the SAR application you mentioned and it does not appear to have any documentation of Grace's maiden name. She was the wife of Urial Wardwell, according to the document. I don't see the name Uzal anywhere.
Based on a brief search, I find that there are 41 trees on Ancestry that list Uzal Wardwell, and not a single one has any records attached.