TextEdit - restoring missing fonts
I have TextEdit set up to use Garamond as my default font for both plain text and rich text documents. I was recently looking over other fonts to use as a default, and decided to go back to Garamond, which is when I discovered that Garamond is now missing in TextEdit. I've never deleted any fonts (to my knowledge, at least), and Garamond still appears in Font Book, but only under All Fonts and User. It's missing under Computer.
How can I bring Garamond back to TextEdit?
MacBook Pro, Mac OS X (10.7.5)