" My dear Sir.
Yours of the 13th. is just received. My engagements are such that I can not, at any very early day, visit Rock-Island, to deliver a lecture, or for any other object.
As to the other matter you kindly mention, I must, in candor, say I do not think myself fit for the Presidency. I certainly am flattered, and gratified, that some partial friends think of me in that connection; but I really think it best for our cause that no concerted effort, such as you suggest, should be made.
Let this be considered confidential. Yours very truly,
{Abraham Lincoln} "

― Abraham Lincoln , Speeches and Writings 1859–1865