“We commonly say in the trade that the most dangerous animal in a zoo is Man.”

“..the most dangerous animal in a zoo is Man.”

“Socially inferior animals are the ones that make the most strenuous, resourceful efforts to get to know their keepers. They prove to be the ones most faithful to them…it is a fact commonly known in the trade.”

“In zoos, along with the animals, the humanity of man is also prisoned! No cage is humane!”

“A good zoo is a place of carefully worked-out coincidence: exactly where an animal says to us, "Stay out!"...we say to it, "Stay in!" with our barriers. Under such conditions of diplomatic peace, all animals are content and we can relax and have a look at each other.”

“Just beyond the ticket booth Father had painted on a wall in bright red letters the question: DO YOU KNOW WHICH IS THE MOST DANGEROUS ANIMAL IN THE ZOO? An arrow pointed to a small curtain. There were so many eager, curious hands that pulled at the curtain that we had to replace it regularly. Behind it was a mirror.”