She sent Mercury , the messenger of the gods , to look for it , for she did n't dare leave the rainbow again , lest somebody should run off with that too . Mercury asked all the trees if they had seen the pot of gold , and the elm , oak and pine pointed to the poplar and said , '' ` The poplar can tell you where it is . ' '' ` How can I tell you where it is ? ' cried the poplar , and she held up all her branches in surprise , just as we hold up our hands -- and down tumbled the pot of gold . The poplar was amazed and indignant , for she was a very honest tree . She stretched her boughs high above her head and declared that she would always hold them like that , so that nobody could hide stolen gold under them again . And she taught all the little poplars she knew to stand the same way , and that is why Lombardy poplars always do . But the aspen poplar leaves are always shaking , even on the very calmest day . And do you know why ? '' And then she told us the old legend that the cross on which the Saviour of the world suffered was made of aspen poplar wood and so never again could its poor , shaken , shivering leaves know rest or peace . There was an aspen in the orchard , the very embodiment of youth and spring in its litheness and symmetry . Its little leaves were hanging tremulously , not yet so fully blown as to hide its development of bough and twig , making poetry against the spiritual tints of a spring sunset . `` It does look sad , '' said Peter , `` but it is a pretty tree , and it was n't its fault . '' `` There 's a heavy dew and it 's time we stopped talking nonsense and went in , '' decreed Felicity . `` If we do n't we 'll all have a cold , and then we 'll be miserable enough , but it wo n't be very exciting . '' `` All the same , I wish something exciting would happen , '' finished the Story Girl , as we walked up through the orchard , peopled with its nun-like shadows . `` There 's a new moon tonight , so may be you 'll get your wish , '' said Peter . `` My Aunt Jane did n't believe there was anything in the moon business , but you never can tell . '' The Story Girl did get her wish . Something happened the very next day .
She joined us XXXXX the afternoon with a quite indescribable expression on her face , compounded of triumph , anticipation , and regret .
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