A Crow having found a Mussel on the seashore; took it in his beak and tried for a long time to break the shell by hammering it upon a stone.  
Another Crow—a sly old fellow—came and watched him for some time in silence.
 
"Friend," said he at last, "you'll never break it in that way. Listen to me. This is the way to do it: Fly up as............