We have a secret, just we three,
The robin, and I, and the sweet cherry-tree;
The bird told the tree, and the tree told me,
And nobody knows it but just us three.
But of course the robin knows it best,
Because she built the--I shan't tell the rest;
And laid the four little--something in it--
I'm afraid I shall tell it every minute.
But if the tree and the robin don't peep,
I'll try my best the secret to keep;
Though I know when the little birds fly about
Then the whole secret will be out.
Source: The Golden Book of Poetry (1947)