A short while back he was ever poring over the written page and burning the midnight oil.
Do you write best in the morning or do you burn the midnight oil?
How shall we sit up late at night, burning the midnight oil of study, and yet rise with the dawn, strong from sweet sleep, to guide the plough?
I hate study, and I will not spoil my looks by burning the midnight oil.
Then in radiant secrecy Louisa burned the midnight oil and prepared the little book for the press.