Grover's instructions were to gain a landing on the shore of Grand Lake, and then marching on Franklin, to cut off Taylor's retreat or to attack him in the rear, as circumstances might suggest.
We have seen how, instead of being ready to move from Berwick Bay on the morning of the 10th of April, Grover found his departure delayed by the various causes already mentioned until the morning of the 12th was well advanced.
The flotilla, under Lieutenant-Commander Cooke, composed of the flag-ships Estrella, Arizona, Clifton, and Calhoun, having completed the ferriage of Emory and Weitzel over Berwick Bay, was now occupied in assisting the army transports to convey Grover to his destination, besides standing ready to protect his movement and his landing with its guns.
About noon, when off Cypress Island, the Arizona ran hard and fast aground, and four precious hours were lost in a vain attempt to get her afloat. If, in the light of after events, this may seem like time wasted, it should always be remembered that all four of the gunboats were crowded with troops, while an attack from the Queen of the West and her consorts was to be looked for at any moment. Finally, rather than to put the adventure in peril by a longer delay, Cooke determined to leave the Arizona to take care of herself, and once more steaming ahead, at half-past seven o'clock, the gunboats and transports came to anchor below Miller's Point, off Madame Porter's plantation. At this place, known as Oak Lawn, Grover in the orders under which he was acting had been told he might expect to find a good shell road leading straight to the Teche, and crossing the bayou about the middle of the bow called Irish Bend. Grover at once sent Fiske with two companies of the 1st Louisiana ashore in the Clifton's boats to reconnoitre. It was midnight when, after carefully examining the ground, Fiske returned to the gunboat and reported the road under water, and quite impracticable for all arms. The fleet then got under way, and proceeding about six miles farther up the lake, anchored beyond Magee's Point.
Before daylight Dwight sent two of his staff officers, Captain Denslow and Lieutenant Matthews, ashore, with a small detachment from the 6th New York, to examine the plantation road leading from this point to the Teche. The road being found practicable for all arms, the debarkation began at daybreak.
Dwight landed first. As soon as his leading regiment, the 1st Louisiana, reached the shore, Holcomb threw forward two companies, under Lieutenant-Colonel Fiske, as skirmishers, and formed the battalion in line to cover the landing.
Taylor, when he first learned that the gunboats and transports had passed up Grand Lake, had sent Vincent, with the 2d Louisiana cavalry and a section of Cornay's battery, to Verdun landing, about four miles behind Camp Bisland, to observe and oppose the movement. This was about noon on Sunday, the 12th. In the evening, hearing of the progress of the fleet, Taylor sent a second section of Cornay's battery to the lake, and going himself to Vincent ordered him to follow the movement and try to prevent a landing. The next morning Taylor sent Reily with the 4th Texas, to join Vincent and aid him in retarding Grover's progress.
Taylor seems to have censured Vincent for letting Grover land, yet in truth Vincent was not to blame. The line he had to watch was too long for his numbers, and the Union flotilla could and did move more rapidly on the lake than the Confederate troops by the roads. When he had stationed his pickets at the probable landing-places, and taken up a central position to support them, he had done all that lay in his power. The range and weight of the 9-inch shells of the navy were alone enough to put a serious opposition to the landing out of the question, but as soon as Vincent found where the attempt was to be made, he disposed his men and guns to retard it. Two of Cornay's guns even tried, ineffectually of course, to destroy the transports: Cooke quickly drove them off.
As Holcomb's skirmishers deployed they were met by a brisk fusillade from Vincent's men strongly posted in ambush behind a high fence in the thick wood that skirts the shore; but when Holcomb advanced his battalion Vincent's men fell back on their main body and left the wood to Holcomb, who immediately moved to the edge of the clearing and held it, observing the enemy on the farther border. This was Vincent with his regiment and the four guns of Corney; and from this moment all that was happening on the lake shore passed unseen by the Confederates.
Meanwhile the landing went on very slowly, for the transports could not come nearer to the beach than a hundred yards, and, although the foot-soldiers were able to jump overboard and scramble ashore, and the horses could also take to the water, it was necessary to make a bridge of flats for the guns and caissons of the artillery. Thus it was four o'clock in the afternoon before the whole division found itself assembled on the plantation of Duncan McWilliams on the shore of the lake, with the Teche at the upper reach of Irish Bend four miles to the southward, and Charenton in the hollow of Indian Bend lying but two miles toward the southwest. There were roads in either direction, but Irish Bend was the way to Franklin, and to Franklin Grover was under orders to go.