Once upon a time an African king left his country to make a long trip, and he told one of his guards   36  his treasure room. But the guard was tempted by the riches of the room and began to steal the 37 treasure . He   38 some of boxes of gold and silver and   39 and   40 them with some stones . When the king 41 , he praised the guard for his   42 to duty and sent him away .