Click here for a SLIDESHOW of all the colored Steinhowel images. As you can see, Steinhowel's illustration is for a story that states explicitly that the chief monkey is the king of the monkeys, wearing a crown and sitting on a throne as the human kings do.
M0118 = Perry569. Source: Odo, Fable 27 (shortened). This is Perry 569. For another fable about telling the truth, see the fable of the fox and the wolf, #72, or the story of Mercury and the woodcutter, #781.