Charles Lindbergh Glass Negative

This is a glass negative of (based on my research of his likeness) Charles Lindbergh, along with his wife Anne, who is sitting in the co-pilot's seat. I purchashed this along with other aviation negatives, from an Indiana Goodwill. I took an inverse picture of the negative in order to view the picture. I would like to know whether the glass negative has any value besides historical, and I'm also wondering who took the picture, which I think would be harder to decipher. It must of been a photographer that had access to such people? Any help would be great. Thanks.

Poor