His master, who was naturally a kind man, did not overwork him.
It's a heap onadvisable when addressin' us to overwork that word "barbarian."
It might have been illness, or it might have been anxiety, or it might have been overwork.
He thought her case not very serious—the result, he said, of overwork.
Yes, I am a little oppressed just now with overwork, nor is this avoidable.