Yes, Mary, my Fanny will feel a difference indeed: a daily, hourly difference, in the behaviour of every being who approaches her; and it will be the completion of my happiness to know that I am the doer of it, that I am the person to give the consequence so justly her due. 
My Fanny will feel a difference in the behaviour of everyone who approaches her; and I will be happy to know that I am the doer of it. 