About this same date [April 21] a deputation of sympathizers [from Maryland] visited the President, and demanded a cessation of hostilities until the convening of Congress, accompanying the demand with the assertion that seventy-five thousand Marylanders would contest the passage of troops over their soil. Mr. Lincoln, in refusing to accede to the truce, quietly replied that he presumed there was room enough on her soil to bury seventy-five thousand men.
Williamson, David. Life and Public Services of Abraham Lincoln: Sixteenth President of the United States, and Commander-in-Chief of the Army and Navy of the United States .. Philadelphia: T.B. Peterson, 1864.