Bayou Bienvenue and the British Spies of The Fishermen's Village.
Bayou Bienvenue, formerly called St. Frances River, drains all the waters of a swamp-basin, of triangular form and about eighty square miles in surface, bounded on the west by New Orleans, on the northwest by Chef Menteur, and on the east by Lake Borgne, into which it empties. It receives the waters of several other bayous from the surrounding cypress swamps and prairies. It is navigable for vessels of one hundred tons burden as far as the junction with old Piernas Canal, twelve miles from its mouth. It is about one hundred and twenty yards in width, and has from six to nine feet of water at the bar, according to the flow of the tides. Its principal branch is Bayou Mazant, which runs to the southwest and receives the waters of the canals of the old plantations of Villere, Lacoste, and Laronde, on and near which the British army encamped, about eight miles below New Orleans. The banks of these bayous, which drain the swamp lands on either side of the Mississippi, are usually about twelve feet below the banks of the river, which have been elevated by the deposit of sediment from overflows for centuries. These slopes, from the banks back to the swamps, usually ten to eighteen hundred yards, drain off the waters and form the tillable lands of the sugar and cotton planters. They are protected from overflows by levees thrown up on the banks of the river. These plantation lands formed the only ground in this country for the encampment of a large army, or available for a march on New Orleans. On nearly all the large sugar plantations canals were cut from the bank of the river running back to the swamp, to furnish at high tides water-power for mills which did the grinding or sawing for the plantations.
Bayous Bienvenue and Mazant, as mentioned, formed a waterway from Lake Borgne to the rear of the plantations of Villere, Lacoste, and Laronde, situated but two or three hours' easy march to the city, to which there was a continuous roadway through the plantation lands between the river and the swamps. The enemy was fully informed of every point of approach by spies within the military lines, and since the capture of the gunboats determined on an attempt to secretly invade the environing country, and to assault and capture New Orleans by surprise. But one mile from Lake Borgne, on the low bank of Bayou Bienvenue, was a village of Spanish and Portuguese fishermen and their families. From the bayous and adjacent lakes they furnished the city markets with fish, and were familiar with every body of water and every nook and inlet for many miles around. A number of these became notorious as spies in the pay of the British. Of this treacherous little colony, the names of Maringuier, Old Luiz, Francisco, Graviella, Antonio el Italiano, El Campechano, Mannellilo, and Garcia became known as connected with this disloyalty. These served the English as pilots to their barges, as guides to the best approaches to New Orleans, and as ready spies within and without. The English commander in charge sent Captain Peddie, of the army, on the twentieth of December, as a spy in the disguise of one of these fishermen, to inspect and report upon the feasibility of entering with the army at the mouth of Bayou Bienvenue, landing at the plantations above and marching suddenly by this route on the city. Old Luiz and two others of the fishermen were his guides. He safely and without suspicion penetrated to Villere's plantation, viewed the field for encampment there, and noted the easy route of approach to the city, without an obstruction in the way. His report being most favorable, the British officer in command decided at once on invasion and attack from this direction.