"I received a most amusing postcard the other morning. Unfortunately, it was not signed in a readable manner so I cannot answer it privately. But it comes from Moblie, Ala., and says: 'Dear Mrs. Roosevelt: You have not answered my question, the amount of Negro blood you have in your veins, if any.' I am afraid none of us know how much nor what kind of blood we have in our veins, since chemically it is all the same. And most of us cannot trace our ancestry more than a few generations."