Comdr. John A. Dahlgren (USN) on duty at Navy Yard, calls on Lincoln regarding howitzers to be sent to New York. Extracts from Dahlgren Diary, John G. Nicolay Papers, Library of Congress, Washington, DC.

At 11 A.M. President holds secret meeting with John B. Baldwin, Virginia Unionist, regarding secession. Considers idea of yielding Fort Sumter, S.C., in exchange for loyal pledge from Virginia, but rejects it. U.S. Congress, Joint Committee on Reconstruction, Report of the Joint Committee on Reconstruction, 39th Cong., 1st sess. (Washington, DC: Government Printing Office, 1866), pt. 2, 102-3.

Informs G. V. Fox that decision has been made to let expedition go to Fort Sumter. John S. Tilley, Lincoln Takes Command (Chapel Hill: University of North Carolina Press, 1941), 205.

Writes instructions for Sec. Cameron to send to Maj. Anderson at Fort Sumter: "Hoping still that you will be able to sustain yourself till the 11th. or 12th. inst. the expedition will go forward." Abraham Lincoln to Robert Anderson, 4 April 1861, CW, 4:321-22.