In North Africa the natives have a very easy way to capture monkeys. A gourd, with a hole just sufficiently large so that a monkey can thrust his hand into it, is filled with nuts and fastened firmly to a branch of a tree at sunset. During the night a monkey will discover the scent of food, and its source, and will put his hand into the gourd and grasp a handful of nuts.  But the hole is too small for the monkey to withdraw his clenched fist, and he has not sense enough to let go of his bounty so that he may escape. Thus he pulls and pulls without success, and when morning comes he is quickly and easily taken.