“Joad plodded along, dragging his cloud of dust behind him. A little bit ahead he saw the high-domed shell of a land turtle, crawling slowly along through the dust, its legs working stiffly and jerkily. Joad stopped to watch it, and his shadow fell on the turtle. Instantly head and legs were withdrawn and the short thick tail clamped sideways into the shell. Joad picked it up and turned it over. The back was brown-gray, like the dust, but the underside of the shell was creamy yellow, clean and smooth. Joad shifted his bundle high under his arm and stroked the smooth undershell with his finger, and he pressed it. It was softer than the back. The hard old head came out and tried to look at the pressing finger, and the legs waved wildly. The turtle wetted on Joad’s hand and struggled uselessly in the air. Joad turned it back upright and rolled it up in his coat with his shoes. He could feel it pressing and struggling and fussing under his arm. He moved ahead more quickly now, dragging his heels a little in the fine dust.”

–from The Grapes of Wrath by John Steinbeck