Premise: Blacky peered over at the Green Forest and then over toward the Purple Hills , behind which jolly , round , red Mr. Sun would go to bed very shortly .<br>He shivered as he thought of the Black Shadows that soon would come swiftly out from the Purple Hills across the Big River and over the Green Meadows .<br>With them might come Hooty the Owl , and Hooty would n't object in the least to a Crow dinner .<br>He wished he was in that hemlock-tree that very minute .
Hypothesis: The hills were yellow