From a great photographic card collection called, "Smile for the Birdie", this line-up of clowns or jesters delivers the message in fancy scrollwork inside the card:
So Many freaks yet so few circuses...
Happy Birthday from a Bunch of Clowns
The card measures 4-1/2 by 6-1/4 and is accompanied by a bright white envelope. On the back, it reads:
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." -Albert Einstein, German-born American physicist and Nobel Laureate (1879-1955)