Who is this person?

[RJNorton]

Anita, the text of his book is online here. It looks like the Lincoln years end at page 50. As I was looking at page 50 I was struck by this paragraph:

"Some years after, during the Hayes administration, a Mrs. Rathbone called on the President and his family. I met her as she was leaving, and found that she was the Miss Harris who was in the box with Mr. Lincoln the night he was assassinated. She had just returned from Ohio, and said that Mrs. Lincoln was living there, in a town called Poe. She stated that Mrs. Lincoln requested her to inquire how many of the old employees were still in the White House. It touched me much to think that Mrs. Lincoln did not forget her old employees. I never saw Mrs. Rathbone after this."

Has anyone ever heard of Mary Lincoln living in Poe, Ohio. I never heard of that before. Never once have I ever read that Mary lived for a time in Poe, Ohio.