President reassures Gov. Curtin (Pa.): "I do not think the people of Pennsylvania should be uneasy about an invasion." Abraham Lincoln to Andrew G. Curtin, 28 April 1863, CW, 6:189.

Cabinet meets. President engaged in selecting provost marshals. Welles, Diary.

President Lincoln annotates a letter from Francis Capen, who claims to be a "Certified Practical Meteorologist—& Expert in Computing the Changes of the Weather." Capen assures that his weather-forecasting talent will benefit the War Department. Lincoln writes, "It seems . . . Mr. Capen knows nothing about the weather, in advance. He told me three days ago that it would not rain again till the 30th. of April or 1st. of May. It is raining now & has been for ten hours. I can not spare any more time to Mr. Capen." Francis L. Capen to Abraham Lincoln, 25 April 1863, Abraham Lincoln Papers, Library of Congress, Washington, DC; Memorandum Concerning Francis L. Capen's Weather Forecasts, 28 April 1863, CW, 6:190-91.

Lincoln visits Navy Ordnance Bureau to settle claim of Horatio Ames of Connecticut regarding contract for big guns. Bruce, Tools of War, 236-37.