Conversation so far:
What did Matthew Fontaine Maury do later in his life?
Matthew Fontaine Maury accepted a teaching position at the Virginia Military Institute, holding the chair of physics.
How long did Matthew Fontaine Maury teach at the Virginia Military Institute?
Did Matthew Fontaine Maury die?
Matthew Fontaine Maury died at home in Lexington at 12:40 pm, on Saturday, February 1, 1873.

Question: Who was his wife?
Self-contained rewrite: Who was Matthew Fontaine Maury's wife?