Thank you for taking this on Kenneth!
I agree with, Dennis. The Fletcher profile clearly indicates Robert's wife is unknown, and I see the same in Torrey, and in the Robert Fletcher bio, where several possible names are discussed and a number of sources listed. I didn't take the time to check them all, but a number are familiar, which means they may now available on archive.org or hathitrust. If you google the title and author you should be able to find them.
If I was in your seat, I would merge them all into Unknown, and include a clear note showing the various options for his wife, with sources for each, and an invitation for other WikiTree members to provide sources that you are missing.