The sun never rose on a more beautiful morning than that of Sunday, April 6th. Lulled by the general security, I had remained in pleasant quarters at Crump's, below Pittsburgh Landing, on the river. By sunrise I was roused by the cry: "They're fighting above." Volleys of musketry could sure enough be distinguished, and occasionally the sullen boom of artillery came echoing down the stream. Momentarily the volume of sound increased, till it became evident it was no skirmish that was in progress, and that a considerable portion of the army must be already engaged. Hastily springing on the guards of a passing steamboat, I hurried up. The sweet Spring sunshine danced over the rippling waters, and softly lit up the green of the banks. A few fleecy clouds alone broke the azure above. A light breeze murmured among the young leaves; the blue-birds were singing their gentle treble to the stern music that still came louder and deeper to us from the bluffs above, and the frogs were croaking their feeble imitation from the marshy islands that studded the channel. Even this early the west bank of the river was lined with the usual fugitives from action, hurriedly pushing onwards, they knew not where, except down stream away from the fight. An officer on board hailed numbers of them and demanded their reason for being there; but they all gave him the same response: "We're clean cut to pieces, and every man must save himself." At the landing appearances became still more ominous. Our two Cincinnati wooden gunboats, Tyler and Lexington, were edging uneasily up and down the banks, eager to put in their broadsides of heavy guns, but unable to find where they could do it. The roar of battle was startlingly close, and showed that the Rebels were in earnest attempt to carry out their threat of driving us into the river. The landing and bluff above were covered with cowards, who had fled from their ranks to the rear for safety, and who were telling the most fearful stories of the Rebel onset and the sufferings of their own particular regiments. Momentarily fresh fugitives came back, often guns in hand, and all giving the same accounts of thickening disasters in front. Hurrying out toward the scene of action, I was soon convinced that there was too much foundation for the tales of the runaways. Sherman's and Prentiss' entire divisions were falling back in disorder, sharply pressed by the Rebels in overwhelming numbers, at all points. McClernand's had already lost part of its camps, and it, too, was falling back. There was one consolation--only one--I could see just then; history, so the divines say, is positive on the point that no attack ever made on the Sabbath was eventually a success to the attacking party. Nevertheless, the signs were sadly against the theologians. Let me return--premising that I have thus brought the reader into the scene near the close of the first act in our Sunday's tragedy--to the preliminaries of the opening of the assault.