THE LAST STRAW.
The Camel Driver. "NOW, WHICH HUMP HAD THIS BETTER GO ON?"
The Camel. "IT'S ALL THE SAME TO ME. IT'S BOUND TO BREAK MY BACK ANYHOW."
Old Josh (who has just purchased stamp). "Would yer mind a-stickin' of it on for me, missie? Oi bain't no scholard."