After that, she must get to work.
She was not very strong yet, but had undertaken extra duties that necessitated private study.

Now she felt tired after lecturing a class of absent-minded girls, and closing her eyes, abandoned herself to moody thought.

George's warning was bearing fruit.

Agatha was young, but knew one soon got jaded and youth slipped away.

There was a risk of her spending in unrewarded efforts the years that ought to be happiest, and then finding herself old and soured.