four o'clock
He fell upon the enemy with his command and drove him back with great slaughter . Palmerston was again re-established , and , with his position strengthened , could now hold it . The battle raged with great fury the full length of the line , and never did a Spartan band stand more firmly than did our gallant men . At four o'clock like a mighty tempest in all its most terrible fury did the musketry and artillery of the enemy burst forth upon Papson 's devoted columns , the entire rebel forces moving down upon him in solid phalanx . Our forces replied with all their artillery . The roar of the artillery , with its blazing fire , the rattle of the musketry on both sides , equaled any ever heard or witnessed . Solid masses boldly marched up in front of Papson 's lines , where they were literally mowed down by our musketry and discharges of shrapnel and canister from our batteries .