Navigating through the sinister Castle area in the Resident Evil 4 remake presents players with several intricate brainteasers designed to test observation skills. One such obstacle is the Lithographic Stones puzzle, often referred to by players as the wall with four slots. Solving this riddle is required to proceed further into the castle, making it an essential roadblock to overcome during Leon's rescue mission.

Finding the Wall With Four Slots Location

The four-slot wall puzzle is located inside the Bindery room, which you enter during Chapter 8 of the main campaign. Upon entering the room, players will notice a large ornate wall mechanism missing several key pieces. The area is relatively safe from immediate threats, allowing you to search the surroundings carefully.

To activate the mechanism, you must first gather all four Lithographic Stones scattered around the room. Stone A is already placed inside the wall slot as an initial clue for players. The remaining three stones are hidden nearby on tables, shelves, and books within the same room.

Locating the Missing Lithographic Stones

Search the tables and display cases surrounding the Bindery to retrieve Lithographic Stones B, C, and D. One stone sits clearly on a desk near the center of the room, while another rests on a bookshelf close to the wall relief. The final stone can be found on a small pedestal near the entrance corner.

Once all four stones are in Leon's inventory, return to the wall with four slots to begin arranging them. Each stone features two sides with different iconography, including symbols like helmets, shields, armor, and swords enclosed in specific border shapes. Matching both the symbol and its outer border frame is essential to unlocking the door.

Solving the Lithographic Stone Slot Puzzle

To solve the puzzle, examine the faded engravings on the four slots surrounding the central mechanism. The top slot requires the Lithographic Stone showing a hexagon border around a red helmet. Place the corresponding stone into position, flipping it over if the wrong side is facing forward.

The left slot demands a square border displaying a shield symbol. Place the hexagon armor symbol into the bottom slot, and insert the square sword symbol into the right slot. Once all four stones match the surrounding clues perfectly, the heavy stone wall will slide open, revealing the pathway forward.

Rewards and Progressing Past the Bindery

Unlocking the wall with four slots allows Leon to proceed into the adjacent hallways towards the courtyard. Behind the newly opened doorway, players can discover useful supplies, including ammo and valuable treasures to sell to the Merchant. Successfully solving this puzzle keeps story momentum flowing smoothly without unnecessary back-tracking.

Understanding how the symbols align saves valuable time and resources during high-difficulty playthroughs. Pay close attention to both the image and the shape of the border frame when matching each piece. Mastering these environment puzzles ensures a seamless journey through the haunting corridors of Salazar's castle.