But Tommy didn't mind that threat. Oh, my, no! Tommy didn't mind it at all. He can fly, and so he had no fear of Shadow the Weasel. But he was terribly afraid for Happy Jack. He knew, just as Happy Jack knew, that there wasn't a single place where Happy Jack could hide into which Shadow could not follow him. So Tommy flitted from tree to tree behind Happy Jack, hoping that in some way he might be able to help him. From tree to tree raced Happy Jack, making desperately long leaps. Shadow the Weasel followed, and though he ran swiftly, he didn't appear to be hurrying, and he took no chances on those long leaps. If the leap was too long to take safely, Shadow simply ran back down the tree, across to the next one and up that. It didn't worry him at all that Happy Jack was so far ahead that he was out of sight. He knew that he could trust his nose to follow the scent of Happy Jack. In fact, it rather pleased him to have Happy Jack race away in such fright, for in that way he would soon tire himself out. And this is just what Happy Jack did do. He ran and jumped and jumped and ran as fast as he could until he was so out of breath that he just had to stop for a rest. But he couldn't rest much. He was too terribly frightened. He shivered and shook while he got his breath, and never for a second did he take his eyes from his back trail. Presently he saw a slim white form darting along the snow straight towards the tree in which he was resting. Once more Happy Jack ran, and somehow he felt terribly helpless and hopeless. He had to rest oftener now, and each rest was shorter than the one before, because, you know, Shadow was a less and less distance behind. Poor Happy Jack! He had tried every trick he knew, and not one of them had fooled Shadow the Weasel. Now he was too tired to run much farther. The last little bit of hope left Happy Jack's heart. He blinked his eyes very fast to keep back the tears, as he thought that this was probably the last time he would ever look at the beautiful Green Forest he loved so. Then he gritted his teeth and made up his mind that anyway he would fight his best, even if it was hopeless. It was just at that very minute that he heard the voice of Tommy Tit the Chickadee calling to him in great excitement, and somehow, he didn't know why, a wee bit of hope sprang up in his heart. CHAPTER XV WHO SAVED HAPPY JACK SQUIRREL? Blessed he whose words of cheer Help put hope in place of fear. _Happy Jack._ It never has been fully decided among the little people of the Green Forest and the Green Meadows just who really did save Happy Jack Squirrel. Some say that Tommy Tit the Chickadee deserves all the credit, and some say that--but wait. Let me tell you just what happened, and then perhaps you can decide for yourself who saved Happy Jack.