This is the tortoise page...
"In the end, everyone loses everyone. There was no invention to get around that, and so I felt, that night, like the turtle that everything else in the universe was on top of."
"The world is really a flat plate supported on the back of a giant tortoise."
Tortioses are possibly a symbol for safety. They are constantly protected by an outer shell (connects to Thomas Schell? a possible tag name?) and have the ability to withdraw even further within themseves. This symbol could represent Oskar and his need for feeling safe.
What could the picture with the two turtles, one on top of the other, mean?