Here it is, it’s two o’clock;
I haven’t gone to bed
Because a jingle of a rhyme
Was jingling in my head.
It jingled long. It jingled short,
Until all night I could not sort
That jingle from my head.
'I cannot go to bed, ” I said,
“Until I have it right,
If I should try, I know it would
Keep jingling there all night.”
My little daughter came at last
To say, “No need for such a task,
For now it is daylight.”
Adeline Foster
http://www.poemhunter.com/poem/night-shift-4/
