The AP stands for Administration Pénitentiaire.
3. One brick from the foundation of the Leper Colony that was on the island in the middle of the Maroni river.
The St. Jean stands for Briqueterie de St. Jean (Penal Brick making factory in the town of St. Jean)
St. Jean is a town on the Maroni River, just up stream from St. Laurent, in French Guiana which also housed a prison.
The bricks were hand made by prisoners from the local clay and then sent down river by steamship and out to the Devil's Island prison.
The local jungle clay is a little whiter than most red bricks.
Please also find attached original photographs from the trip abroad.