Gardner was behind these defenses with a garrison of about seven thousand when Banks approached Port Hudson for the second time on May 24th. Gardner was under orders to evacuate the place and join his force to that of Johnston at Jackson, Mississippi, but the courier who brought the order arrived at the very hour when Banks began to bottle up the Confederates. On the morning of May 25th Banks drove in the Confederate skirmishers and outposts and, with an army of thirty thousand, invested the fortifications from the eastward. At 10 A.M., after an artillery duel of more than four hours, the Federals advanced to the assault of the works. Fighting in a dense forest of magnolias, amid thick undergrowth and among ravines choked with felled timber, the progress of the troops was too slow for a telling attack. The battle has been described as "a gigantic bushwhack." The Federals at the center reached the ditch in front of the Confederate works but were driven off. At nightfall the attempt was abandoned. It had cost Banks nearly two thousand men. [Illustration: THE GUN THAT FOOLED THE FEDERALS] A "Quaker gun" that was mounted by the Confederates in the fortifications on the bluff at the river-front before Port Hudson. This gun was hewn out of a pine log and mounted on a carriage, and a black ring was painted around the end facing the river. Throughout the siege it was mistaken by the Federals for a piece of real ordnance. To such devices as this the beleaguered garrison was compelled constantly to resort in order to impress the superior forces investing Port Hudson with the idea that the position they sought to capture was formidably defended. The ruse was effective. Port Hudson was not again attacked from the river after the passing of Farragut's two ships. [Illustration: WITHIN "THE CITADEL" COLLECTION OF FREDERICK H. MESERVE COPYRIGHT, 1911, REVIEW OF REVIEWS CO.] This bastion fort, near the left of the Confederate line of defenses at Port Hudson, was the strongest of their works, and here Weitzel and Grover's divisions of the Federals followed up the attack (begun at daylight of June 14th) that Banks had ordered all along the line in his second effort to capture the position. The only result was simply to advance the Federal lines from fifty to two hundred yards nearer. In front of the "citadel" an advance position was gained from which a mine was subsequently run to within a few yards of the fort. [Illustration: THE FIRST INDIANA NAVY ARTILLERY AT BATON ROUGE COPYRIGHT, 1911, REVIEW OF REVIEWS CO.] [Illustration: PHOTOGRAPHS THAT FURNISHED VALUABLE SECRET SERVICE INFORMATION TO THE CONFEDERATES COPYRIGHT, 1911, REVIEW OF REVIEWS CO.]