The Student looked up from the grass, and listened, but he could not understand what the Nightingale was saying to him, for he only knew the things that are written down in books.
But the Oak-tree understood, and felt sad, for he was very fond of the little Nightingale who had built her nest in his branches.
'Sing me one last song,' he whispered; 'I shall feel very lonely when you are gone.'
So the Nightingale sang to the Oak-tree, and her voice was like water bubbling from a silver jar.