JCoffey above mentioned having seen a picture postcard with the caption "Stay in your own backyard." It has come to my attention recently that images of a lot of old collectible post cards have been posted at various web sites. Some old postcards are appallingly racist—which is to be expected, I suppose, since we know that even photographs of lynchings were turned into postcards.

These are unusual in that they show some awareness of the pain caused by segregation.

I found 3 postcards based on excerpts from this song. Here are the images:

One, two, three.

I wonder how common it was to make postcards based on lyrics from popular songs? I have never heard of any others.