Who did Wesley write this letter to on his deathbed?

Question

Dear Sir,
Unless the divine powers has seized you up to be as 'Athensaious contra mundum', I see not how you can go through your glorious enterprise in opposing the inexorable villainy which is the scandal of religion in England, and of human nature. Unless God has raised you up for this very thing, you will be worn out by the opposition of men and devils. But if God be for you, who can be against you? Are all of them together stroroger than God? Oh be not weary of well doing! Go on in the name of God and in the power of His might till even American slavery (the vilest that has ever saw the sun) shall vanquish away before it.
Reading this morning a tract written by a poor African, I was particdularly struck by that circumstance that a man who has a black skin, being wronged or outraged by a white man can have no redress, being a 'law' in our colonies that the oath of a black man against a white man goes for nothing, what villainy is this?
That He who has guided you from youth up

...That He who has guided you from the youth up may continue to strengthen you in this end and in all things is the prayer of, dear sir,

your affectionate servant
John Wesley

Answer 1

Wasn't that written to William Wilberforce in reference to the slave problem in the in America

Answer 2

he wrote it to me and i have it right here to prove it.