President attends church service. William O. Stoddard, Lincoln's Third Secretary: The Memoirs of William O. Stoddard, ed. by William O. Stoddard, Jr. (New York: Exposition Press, 1955), 84.

Sec. Seward, Gen. Montgomery C. Meigs, and Lincoln drive to Great Falls, Va., returning about dark. Extracts from Meigs Diary, John G. Nicolay Papers, Library of Congress, Washington, DC.

[Mrs. Lincoln in Cambridge, Mass., with Robert. Baltimore Sun, 20 May 1861]