Yet he journeyed to Washington as simply and quietly as possible, avoiding demonstration. He arrived on the 8th of March, and going to a hotel waited, unrecognized, until the throng of travelers had registered, and then wrote, simply, "U. S. Grant and son, Galena." The next day, at 1 o'clock, he was received by President Lincoln in the cabinet-room of the White House. There were present, by the President's invitation, the members of the cabinet, General Halleck, and a few other distinguished men. After introductions the President addressed him as follows:-- "GENERAL GRANT,--The expression of the nation's approbation of what you have already done, and its reliance on you for what remains to be done in the existing great struggle, are now presented with this commission, constituting you lieutenant-general in the army of the United States. With the high honor, devolves on you an additional responsibility. As the country herein trusts you, so, under God, it will sustain you. I scarcely need to add, that with what I here speak for the nation goes my own hearty personal concurrence." General Grant made the following reply:-- "MR. PRESIDENT,--I accept the commission with gratitude for the high honor conferred. With the aid of the noble armies that have fought on so many battlefields for our common country, it will be my earnest endeavor not to disappoint your expectations. I feel the full weight of the responsibilities now devolving upon me; and I know that if they are met, it will be due to those armies; and, above all, to the favor of that Providence which leads both nations and men." The next day he was assigned to the command of all the armies, with headquarters in the field. He made a hurried trip to Culpeper Court House for a conference with General Meade, commanding the Army of the Potomac; but would not linger in Washington to be praised and feted. He hastened back to Nashville, where, on the 17th, he issued an order assuming command of the armies of the United States, announcing that until further notice, his headquarters would be with the Army of the Potomac. General Halleck was relieved from duty as general-in-chief; but was assigned by Grant to duty in Washington, as chief-of-staff of the army. Sherman was assigned to command the military division of the Mississippi, which was enlarged, and McPherson took Sherman's place as commander of the Army of the Tennessee; Thomas remaining in command of the Army of the Cumberland. On the 23d Grant was again in Washington, accompanied by his family and his personal staff. On the next day he took actual command, and immediately reorganized the Army of the Potomac in three corps,--the Second, Fifth, and Sixth,--commanded by Major-Generals Hancock, Warren, and Sedgwick; Major-General Meade retaining the supreme command. The cavalry was consolidated into a corps under Sheridan. Burnside commanded the Ninth Corps, which for a brief time acted independently.