Too Few Circuses Birthday Card

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)