"Let me congratulate you on the conclusion of your story [North and South]; not because it is the end of a task to which you had conceived a dislike (for I imagine you to have got the better of that delusion by this time), but because it is the vigorous and powerful accomplishment of an anxious labour. It seems to me that you have felt the ground thoroughly firm under your feet, and have strided on with a force and purpose that MUST now give you pleasure."
January 1, 1970
https://en.wikiquote.org/wiki/Elizabeth_Gaskell