Hi Liz,
I don't know how long they are, only that some other wills I have seen from the late 1800s/early 1900s had many pages and attachments. The Roney ones might be quite short.
All I know is that there are 13 Roney wills on Brian's index: www.iomfhs.im/lawsons/wills/r-will.html

I was hoping that Terrance would give more information about his ancestor so that you could look at the most likely possibilities to be her parents/grandparents.

Sue