At Simmesport the Corps sustained its first loss by expiration of service. The 6th New York, having completed the two years' term for which it had enlisted, went by the Atchafalaya and the railway to New Orleans, and there presently took transport for New York to be mustered out. The movements of the army, though pressed as much as possible, were greatly retarded by the scanty means of water transportation and the pressing need of coal. From this cause the navy was also suffering, and urgent means had to be taken to supply the deficiency. Reconnoissances, conducted by Lieutenant Harwood, in the course of which the enemy's cavalry was seen but not engaged, showed the roads from the Atchafalaya to Waterloo to be practicable for all arms. A detachment of cavalry sent out on the 18th to ascertain whether the Confederates had any force on the west bank of the Mississippi, encountered near Waterloo about 120 men of the 1st Alabama regiment, under Lieutenant-Colonel Locke, who had been sent over the day before from Port Hudson in skiffs to prevent any communication between the upper and the lower fleets. A skirmish followed, with slight loss on either side. First placing Emory in command of the defences of New Orleans, and ordering Sherman to take Dow and Nickerson and join Augur before Port Hudson, Banks left the city on the 20th of May, rejoined his headquarters on the 21st, and at once set his troops in motion toward Bayou Sara. At half-past eight o'clock on the morning of the 21st of May, Paine broke up his bivouac on the Atchafalaya and marched to Morganza, after detaching the 131st New York and the 173d New York with a section of artillery to guard the ammunition train. Grover followed by water as fast as the steamboats could be provided. At two o'clock on the morning of the 22d of May, Banks and Grover, with the advance of Grover's division, landed at Bayou Sara without meeting any opposition from the enemy, who, up to this time, seems not to have suspected the movement. The other troops followed as rapidly as the means of transport permitted. Grover's division was sent ashore, followed by two brigades of Paine's division from Morganza. The wagon train went on down the road to the landing directly opposite Bayou Sara, under the escort of the 110th New York, and the 162d New York, with one section of Carruth's battery, all under the command of Benedict.