Lincoln writes Trumbull: "Gen. Duff Green is out here endeavoring to draw a letter out of me. I have written one, which herewith I inclose to you, and which I believe could not be used to our disadvantage. Still, if, on consultation with our discreet friends, you conclude that it may do us harm, do not deliver it." [Enclosure, which states that Lincoln would not oppose constitutional amendment, and that he would uphold right of each state to control its domestic institutions, is not delivered.] Abraham Lincoln to Duff Green, 28 December 1860, CW, 4:162-63.