Julia thought of August's love with a sinking into despair.
But then returned the memory of his faithlessness, of all she had been compelled to believe and suffer.

Then her agony came back, and she was glad that she had taken a decided step.

Any escape was a relief.

I suppose it is under some such impulse that people kill themselves.

Julia felt as though she had committed suicide and escaped.
Humphreys on his part was not satisfied.