Finally the monkey had his fill, and hopped up into Tom's lap.  He began to play with Tom's hair, smoothing it down pretty soon with the flyer's comb, which he discovered in a pocket.  So handy was Grandpa with this utensil that the others went into peals of laughter.  Tiring of this, the monkey's eye caught sight of several freckles upon the back of Tom's hand.  He tried in vain to pick the freckles off; then he became excited, for he could not understand why they would not lift up. He chattered scoldingly at everybody; then tried again.  Failing, he sprang down and went to a far corner, in a fine sulk.  Evidently he thought Tom was playing a trick on him, and had glued the freckles down someway just to tease him; for Tom, it must be admitted, was greatly given to bothering Grandpa in some such manner.