...ention, either in regard to the movements of General Buell's army or the existence of extensive works at Pittsburg landing. General Beauregard had the concurrent evidence of prisoners and scouts that Buell 's arrival was confidently expected. It was this knowledge that led him on the night of the 3d of April, at the hour of 11 o'clock, to send me to General Johnston to urge an immediate advance on Pit...