... with his nails, but the earth was too hard. What should he do? He sought a stick with a fork in it and dug in the earth, but it was slow work. Then he found a clamshell. He did better with it, but it was hard work, and Robinson was not used to hard work. The sweat ran down his face and he had often to stop and rest in the shade. The sun burned so hot and the rock so reflected the heat that he was all but overcome. ... — An American Robinson Crusoe • Samuel B. Allison